diff --git a/panels/config/core/ha-config-section-themes.html b/panels/config/core/ha-config-section-themes.html
index 4735d32566..62995c0bc3 100644
--- a/panels/config/core/ha-config-section-themes.html
+++ b/panels/config/core/ha-config-section-themes.html
@@ -11,7 +11,7 @@
     <ha-config-section is-wide='[[isWide]]'>
       <span slot='header'>Set a theme</span>
       <span slot='introduction'>
-        Choose 'default' to use whatever theme the backend chooses or pick a theme for this device.
+        Choose 'Backend-selected' to use whatever theme the backend chooses or pick a theme for this device.
       </span>
 
       <paper-card>
diff --git a/panels/config/customize/ha-config-customize.html b/panels/config/customize/ha-config-customize.html
new file mode 100644
index 0000000000..b6e2472741
--- /dev/null
+++ b/panels/config/customize/ha-config-customize.html
@@ -0,0 +1,89 @@
+<link rel="import" href="../../../bower_components/polymer/polymer-element.html">
+<link rel="import" href="../../../bower_components/app-layout/app-header-layout/app-header-layout.html">
+<link rel="import" href="../../../bower_components/app-layout/app-header/app-header.html">
+<link rel="import" href="../../../bower_components/app-layout/app-toolbar/app-toolbar.html">
+<link rel="import" href="../../../bower_components/paper-icon-button/paper-icon-button.html">
+
+<link rel="import" href="../../../src/util/hass-util.html">
+<link rel="import" href="../../../src/resources/ha-style.html">
+
+<link rel="import" href="./ha-form-customize.html">
+<link rel="import" href="../ha-config-section.html">
+<link rel="import" href="../ha-entity-config.html">
+
+<dom-module id="ha-config-customize">
+  <template>
+    <style include="ha-style">
+    </style>
+
+    <app-header-layout has-scrolling-region>
+      <app-header slot="header" fixed>
+        <app-toolbar>
+          <paper-icon-button
+            icon='mdi:arrow-left'
+            on-tap='_backTapped'
+          ></paper-icon-button>
+          <div main-title>Customization</div>
+        </app-toolbar>
+      </app-header>
+
+      <div class$='[[computeClasses(isWide)]]'>
+        <ha-config-section is-wide='[[isWide]]'>
+          <span slot='header'>Customization</span>
+          <span slot='introduction'>
+            Tweak per-entity attributes.<br>
+            Added/edited customizations will take effect immidiately. Removed customizations will take effect when the entity is updated.
+          </span>
+          <ha-entity-config
+            hass='[[hass]]'
+            label='Entity'
+            entities='[[entities]]'
+            config='[[entityConfig]]'>
+          </ha-entity-config>
+        </ha-config-section>
+      </div>
+    </app-header-layout>
+  </template>
+</dom-module>
+
+<script>
+class HaConfigCustomize extends Polymer.Element {
+  static get is() { return 'ha-config-customize'; }
+
+  static get properties() {
+    return {
+      hass: Object,
+      isWide: Boolean,
+
+      entities: {
+        type: Array,
+        computed: 'computeEntities(hass)',
+      },
+
+      entityConfig: {
+        type: Object,
+        value: {
+          component: 'ha-form-customize',
+          computeSelectCaption: stateObj =>
+            window.hassUtil.computeStateName(stateObj) + ' (' + window.hassUtil.computeDomain(stateObj) + ')'
+        }
+      },
+    };
+  }
+
+  computeClasses(isWide) {
+    return isWide ? 'content' : 'content narrow';
+  }
+
+  _backTapped() {
+    history.back();
+  }
+
+  computeEntities(hass) {
+    return Object.keys(hass.states)
+      .map(key => hass.states[key])
+      .sort(window.hassUtil.sortByName);
+  }
+}
+customElements.define(HaConfigCustomize.is, HaConfigCustomize);
+</script>
diff --git a/panels/config/customize/ha-customize-attribute.html b/panels/config/customize/ha-customize-attribute.html
new file mode 100644
index 0000000000..b2d6e10763
--- /dev/null
+++ b/panels/config/customize/ha-customize-attribute.html
@@ -0,0 +1,82 @@
+<link rel="import" href="../../../bower_components/polymer/polymer-element.html">
+<link rel='import' href="../../../bower_components/paper-icon-button/paper-icon-button.html">
+<link rel="import" href="../ha-form-style.html">
+<script src="../../../src/util/hass-attributes-util.js"></script>
+<link rel="import" href="./types/ha-customize-array.html">
+<link rel="import" href="./types/ha-customize-boolean.html">
+<link rel="import" href="./types/ha-customize-icon.html">
+<link rel="import" href="./types/ha-customize-key-value.html">
+<link rel="import" href="./types/ha-customize-string.html">
+
+<dom-module id="ha-customize-attribute">
+  <template>
+    <style include="ha-form-style">
+      :host {
+        display: block;
+        position: relative;
+        padding-right: 40px;
+      }
+
+      .button {
+        position: absolute;
+        margin-top: -20px;
+        top: 50%;
+        right: 0;
+      }
+    </style>
+    <div id='wrapper' class='form-group'></div>
+    <paper-icon-button class="button" icon="[[getIcon(item.secondary)]]" on-tap="tapButton"></paper-icon-button>
+  </template>
+</dom-module>
+
+<script>
+class HaCustomizeAttribute extends Polymer.Element {
+
+  static get is() { return 'ha-customize-attribute'; }
+
+  static get properties() {
+    return {
+      item: {
+        type: Object,
+        notify: true,
+        observer: 'itemObserver',
+      }
+    };
+  }
+
+  tapButton() {
+    if (this.item.secondary) {
+      this.item = Object.assign({}, this.item, { secondary: false });
+    } else {
+      this.item = Object.assign({}, this.item, { closed: true });
+    }
+  }
+
+  getIcon(secondary) {
+    return secondary ? 'mdi:pencil' : 'mdi:close';
+  }
+
+  itemObserver(item) {
+    const wrapper = this.$.wrapper;
+    const tag = window.hassAttributeUtil.TYPE_TO_TAG[item.type].toUpperCase();
+    let child;
+    if (wrapper.lastChild && wrapper.lastChild.tagName === tag) {
+      child = wrapper.lastChild;
+    } else {
+      if (wrapper.lastChild) {
+        wrapper.removeChild(wrapper.lastChild);
+      }
+      this.$.child = child = document.createElement(tag);
+      child.className = 'form-control';
+      child.addEventListener('item-changed', () => {
+        this.item = Object.assign({}, child.item);
+      });
+    }
+    child.setProperties({ item: this.item });
+    if (child.parentNode === null) {
+      wrapper.appendChild(child);
+    }
+  }
+}
+customElements.define(HaCustomizeAttribute.is, HaCustomizeAttribute);
+</script>
diff --git a/panels/config/customize/ha-form-customize-attributes.html b/panels/config/customize/ha-form-customize-attributes.html
new file mode 100644
index 0000000000..6076e774c2
--- /dev/null
+++ b/panels/config/customize/ha-form-customize-attributes.html
@@ -0,0 +1,36 @@
+<link rel="import" href="../../../bower_components/polymer/polymer-element.html">
+
+<link rel="import" href="./ha-customize-attribute.html">
+
+<dom-module id="ha-form-customize-attributes">
+  <template>
+    <style>
+      [hidden] {
+        display: none;
+      }
+    </style>
+    <template is='dom-repeat' items='{{attributes}}'>
+      <ha-customize-attribute
+        item="{{item}}"
+        hidden$="[[item.closed]]">
+      </ha-customize-attribute>
+    </template>
+  </template>
+</dom-module>
+
+<script>
+class HaFormCustomizeAttributes extends Polymer.Element {
+
+  static get is() { return 'ha-form-customize-attributes'; }
+
+  static get properties() {
+    return {
+      attributes: {
+        type: Array,
+        notify: true,
+      },
+    };
+  }
+}
+customElements.define(HaFormCustomizeAttributes.is, HaFormCustomizeAttributes);
+</script>
diff --git a/panels/config/customize/ha-form-customize.html b/panels/config/customize/ha-form-customize.html
new file mode 100644
index 0000000000..3773bee6ee
--- /dev/null
+++ b/panels/config/customize/ha-form-customize.html
@@ -0,0 +1,277 @@
+<link rel="import" href="../../../bower_components/polymer/polymer.html">
+<link rel="import" href="../../../bower_components/paper-dropdown-menu/paper-dropdown-menu.html">
+<link rel='import' href='../../../bower_components/paper-listbox/paper-listbox.html'>
+<link rel='import' href='../../../bower_components/paper-item/paper-item.html'>
+
+<link rel="import" href="../../../src/util/hass-util.html">
+<script src="../../../src/util/hass-attributes-util.js"></script>
+
+<link rel="import" href="./ha-form-customize-attributes.html">
+
+<dom-module id="ha-form-customize">
+  <template>
+    <style include="iron-flex ha-style ha-form-style">
+      [hidden] {
+        display: none;
+      }
+
+      .warning {
+        color: red;
+      }
+
+      .attributes-text {
+        padding-left: 20px;
+      }
+    </style>
+    <template is='dom-if' if='[[computeShowWarning(localConfig, globalConfig)]]'>
+      <div class="warning">
+        It seems that your configuration.yaml doesn't properly include customize.yaml<br>
+        Changes made here won't affect your configuration.
+      </div>
+    </template>
+    <!-- <dom-if> would be more appropriate here, but due to
+         https://github.com/Polymer/polymer/issues/4818 array observations don't
+         propagate properly via <dom-if>.
+    -->
+    <div hidden$='[[!hasLocalAttributes]]'>
+      <h4 class="attributes-text">
+        The following attributes are already set in customize.yaml<br>
+      </h4>
+      <ha-form-customize-attributes attributes="{{localAttributes}}"></ha-form-customize-attributes>
+    </div>
+    <div hidden$='[[!hasGlobalAttributes]]'>
+      <h4 class="attributes-text">
+        The following attributes are customized from outside of customize.yaml<br>
+        Possibly via a domain, a glob or a different include.
+      </h4>
+      <ha-form-customize-attributes attributes="{{globalAttributes}}"></ha-form-customize-attributes>
+    </div>
+    <div hidden$='[[!hasExistingAttributes]]'>
+      <h4 class="attributes-text">
+        The following attributes of the entity are set programatically.<br>
+        You can override them if you like.
+      </h4>
+      <ha-form-customize-attributes attributes="{{existingAttributes}}"></ha-form-customize-attributes>
+    </div>
+    <div hidden$='[[!hasNewAttributes]]'>
+      <h4 class="attributes-text">
+        The following attributes weren't set. Set them if you like.
+      </h4>
+      <ha-form-customize-attributes attributes="{{newAttributes}}"></ha-form-customize-attributes>
+    </div>
+    <div class='form-group'>
+      <paper-dropdown-menu
+        label='Pick an attribute to override'
+        class='flex'
+        dynamic-align
+      >
+        <paper-listbox
+          slot="dropdown-content"
+          selected='{{selectedNewAttribute}}'
+        >
+          <template is='dom-repeat' items='[[newAttributesOptions]]' as='option'>
+            <paper-item>[[option]]</paper-item>
+          </template>
+        </paper-listbox>
+      </paper-dropdown-menu>
+    </div>
+  </template>
+</dom-module>
+
+<script>
+class HaFormCustomize extends Polymer.Element {
+
+  static get is() { return 'ha-form-customize'; }
+
+  static get properties() {
+    return {
+      hass: {
+        type: Object,
+      },
+
+      entity: Object,
+
+      localAttributes: {
+        type: Array,
+        computed: 'computeLocalAttributes(localConfig)',
+      },
+      hasLocalAttributes: Boolean,
+
+      globalAttributes: {
+        type: Array,
+        computed: 'computeGlobalAttributes(localConfig, globalConfig)',
+      },
+      hasGlobalAttributes: Boolean,
+
+      existingAttributes: {
+        type: Array,
+        computed: 'computeExistingAttributes(localConfig, globalConfig, entity)',
+      },
+      hasExistingAttributes: Boolean,
+
+      newAttributes: {
+        type: Array,
+        value: [],
+      },
+      hasNewAttributes: Boolean,
+
+      newAttributesOptions: Array,
+      selectedNewAttribute: {
+        type: Number,
+        value: -1,
+        observer: 'selectedNewAttributeObserver',
+      },
+
+      localConfig: Object,
+      globalConfig: Object,
+    };
+  }
+
+  static get observers() {
+    return [
+      'attributesObserver(localAttributes.*, globalAttributes.*, existingAttributes.*, newAttributes.*)',
+    ];
+  }
+
+  _initOpenObject(key, value, secondary, config) {
+    return Object.assign({
+      attribute: key,
+      value: value,
+      closed: false,
+      domain: window.hassUtil.computeDomain(this.entity),
+      secondary: secondary,
+      description: key,
+    }, config);
+  }
+
+  loadEntity(entity) {
+    this.entity = entity;
+    return this.hass.callApi('GET', 'config/customize/config/' + entity.entity_id)
+          .then((data) => {
+            this.localConfig = data.local;
+            this.globalConfig = data.global;
+            this.newAttributes = [];
+          });
+  }
+
+  saveEntity() {
+    const data = {};
+    const attrs = this.localAttributes.concat(
+      this.globalAttributes, this.existingAttributes, this.newAttributes);
+    attrs.forEach((attr) => {
+      if (attr.closed || attr.secondary || !attr.attribute || !attr.value) return;
+      data[attr.attribute] = (attr.type === 'json' ? JSON.parse(attr.value) : attr.value);
+    });
+
+    const objectId = this.entity.entity_id;
+    return this.hass.callApi('POST', 'config/customize/config/' + objectId, data);
+  }
+
+  _computeSingleAttribute(key, value, secondary) {
+    const config = window.hassAttributeUtil.LOGIC_STATE_ATTRIBUTES[key]
+        || { type: window.hassAttributeUtil.UNKNOWN_TYPE };
+    return this._initOpenObject(key, config.type === 'json' ? JSON.stringify(value) : value, secondary, config);
+  }
+
+  _computeAttributes(config, keys, secondary) {
+    return keys.map(key => this._computeSingleAttribute(key, config[key], secondary));
+  }
+
+  computeLocalAttributes(localConfig) {
+    if (!localConfig) return [];
+    const localKeys = Object.keys(localConfig);
+    const result = this._computeAttributes(localConfig, localKeys, false);
+    return result;
+  }
+
+  computeGlobalAttributes(localConfig, globalConfig) {
+    if (!localConfig || !globalConfig) return [];
+    const localKeys = Object.keys(localConfig);
+    const globalKeys = Object.keys(globalConfig).filter(key => !localKeys.includes(key));
+    return this._computeAttributes(globalConfig, globalKeys, true);
+  }
+
+  computeExistingAttributes(localConfig, globalConfig, entity) {
+    if (!localConfig || !globalConfig || !entity) return [];
+    const localKeys = Object.keys(localConfig);
+    const globalKeys = Object.keys(globalConfig);
+    const entityKeys = Object.keys(entity.attributes)
+        .filter(key => !localKeys.includes(key) && !globalKeys.includes(key));
+    return this._computeAttributes(entity.attributes, entityKeys, true);
+  }
+
+  computeShowWarning(localConfig, globalConfig) {
+    if (!localConfig || !globalConfig) return false;
+    return Object.keys(localConfig).some(
+        key => JSON.stringify(globalConfig[key]) !== JSON.stringify(localConfig[key]));
+  }
+
+  filterFromAttributes(attributes) {
+    return key => !attributes || attributes.every(attr => attr.attribute !== key || attr.closed);
+  }
+
+  getNewAttributesOptions(localAttributes, globalAttributes, existingAttributes, newAttributes) {
+    const knownKeys =
+        Object.keys(window.hassAttributeUtil.LOGIC_STATE_ATTRIBUTES)
+            .filter(key => window.hassAttributeUtil.LOGIC_STATE_ATTRIBUTES[key])
+            .filter(this.filterFromAttributes(localAttributes))
+            .filter(this.filterFromAttributes(globalAttributes))
+            .filter(this.filterFromAttributes(existingAttributes))
+            .filter(this.filterFromAttributes(newAttributes));
+    return knownKeys.sort().concat('Other');
+  }
+
+  selectedNewAttributeObserver(selected) {
+    if (selected < 0) return;
+    const option = this.newAttributesOptions[selected];
+    if (selected === this.newAttributesOptions.length - 1) {
+      // The "Other" option.
+      const attr = this._initOpenObject('', '', false /* secondary */, { type: window.hassAttributeUtil.ADD_TYPE });
+      this.push('newAttributes', attr);
+      this.selectedNewAttribute = -1;
+      return;
+    }
+    let result = this.localAttributes.findIndex(attr => attr.attribute === option);
+    if (result >= 0) {
+      this.set('localAttributes.' + result + '.closed', false);
+      this.selectedNewAttribute = -1;
+      return;
+    }
+    result = this.globalAttributes.findIndex(attr => attr.attribute === option);
+    if (result >= 0) {
+      this.set('globalAttributes.' + result + '.closed', false);
+      this.selectedNewAttribute = -1;
+      return;
+    }
+    result = this.existingAttributes.findIndex(attr => attr.attribute === option);
+    if (result >= 0) {
+      this.set('existingAttributes.' + result + '.closed', false);
+      this.selectedNewAttribute = -1;
+      return;
+    }
+    result = this.newAttributes.findIndex(attr => attr.attribute === option);
+    if (result >= 0) {
+      this.set('newAttributes.' + result + '.closed', false);
+      this.selectedNewAttribute = -1;
+      return;
+    }
+    const attr = this._computeSingleAttribute(option, '', false /* secondary */);
+    this.push('newAttributes', attr);
+    this.selectedNewAttribute = -1;
+  }
+
+  attributesObserver() {
+    this.hasLocalAttributes =
+        this.localAttributes && this.localAttributes.some(attr => !attr.closed);
+    this.hasGlobalAttributes =
+        this.globalAttributes && this.globalAttributes.some(attr => !attr.closed);
+    this.hasExistingAttributes =
+        this.existingAttributes && this.existingAttributes.some(attr => !attr.closed);
+    this.hasNewAttributes =
+        this.newAttributes && this.newAttributes.some(attr => !attr.closed);
+    this.newAttributesOptions = this.getNewAttributesOptions(
+        this.localAttributes, this.globalAttributes, this.existingAttributes, this.newAttributes);
+  }
+}
+customElements.define(HaFormCustomize.is, HaFormCustomize);
+</script>
diff --git a/panels/config/customize/types/ha-customize-array.html b/panels/config/customize/types/ha-customize-array.html
new file mode 100644
index 0000000000..f92c6a633e
--- /dev/null
+++ b/panels/config/customize/types/ha-customize-array.html
@@ -0,0 +1,69 @@
+<link rel='import' href='../../../../bower_components/polymer/polymer-element.html'>
+<link rel="import" href="../../../../bower_components/paper-dropdown-menu/paper-dropdown-menu.html">
+<link rel='import' href='../../../../bower_components/paper-listbox/paper-listbox.html'>
+<link rel='import' href='../../../../bower_components/paper-item/paper-item.html'>
+<link rel="import" href="../../../../src/util/hass-mixins.html">
+
+<dom-module id='ha-customize-array'>
+  <template>
+    <style>
+      paper-dropdown-menu {
+        margin: -9px 0;
+      }
+    </style>
+    <paper-dropdown-menu
+      label='[[item.description]]'
+      disabled='[[item.secondary]]'
+      selected-item-label="{{item.value}}"
+      dynamic-align
+    >
+      <paper-listbox
+        slot="dropdown-content"
+        selected='[[computeSelected(item)]]'
+      >
+        <template is='dom-repeat' items='[[getOptions(item)]]' as='option'>
+          <paper-item>[[option]]</paper-item>
+        </template>
+      </paper-listbox>
+    </paper-dropdown-menu>
+  </template>
+</dom-module>
+
+<script>
+class HaCustomizeArray extends window.hassMixins.EventsMixin(Polymer.Element) {
+
+  static get is() { return 'ha-customize-array'; }
+
+  static get properties() {
+    return {
+      item: {
+        type: Object,
+        notifies: true,
+      }
+    };
+  }
+
+  getOptions(item) {
+    const domain = item.domain;
+    if (!domain) {
+      this.item.type = 'string';
+      this.fire('item-changed');
+      return [];
+    }
+    const options = item.options[domain];
+    if (!options) {
+      this.item.type = 'string';
+      this.fire('item-changed');
+      return [];
+    }
+    return options.sort();
+  }
+
+  computeSelected(item) {
+    const options = this.getOptions(item);
+    return options.indexOf(item.value);
+  }
+
+}
+customElements.define(HaCustomizeArray.is, HaCustomizeArray);
+</script>
diff --git a/panels/config/customize/types/ha-customize-boolean.html b/panels/config/customize/types/ha-customize-boolean.html
new file mode 100644
index 0000000000..094ffd61da
--- /dev/null
+++ b/panels/config/customize/types/ha-customize-boolean.html
@@ -0,0 +1,30 @@
+<link rel='import' href='../../../../bower_components/polymer/polymer-element.html'>
+<link rel='import' href='../../../../bower_components/paper-checkbox/paper-checkbox.html'>
+
+<dom-module id='ha-customize-boolean'>
+  <template>
+    <paper-checkbox
+      disabled='[[item.secondary]]'
+      checked="[[item.value]]"
+    >
+      [[item.description]]
+    </paper-checkbox>
+  </template>
+</dom-module>
+
+<script>
+class HaCustomizeBoolean extends Polymer.Element {
+
+  static get is() { return 'ha-customize-boolean'; }
+
+  static get properties() {
+    return {
+      item: {
+        type: Object,
+        notifies: true,
+      }
+    };
+  }
+}
+customElements.define(HaCustomizeBoolean.is, HaCustomizeBoolean);
+</script>
diff --git a/panels/config/customize/types/ha-customize-icon.html b/panels/config/customize/types/ha-customize-icon.html
new file mode 100644
index 0000000000..4a35c7aa4e
--- /dev/null
+++ b/panels/config/customize/types/ha-customize-icon.html
@@ -0,0 +1,43 @@
+<link rel='import' href='../../../../bower_components/polymer/polymer-element.html'>
+<link rel='import' href='../../../../bower_components/iron-icon/iron-icon.html'>
+<link rel='import' href='../../../../bower_components/paper-input/paper-input.html'>
+
+<dom-module id='ha-customize-icon'>
+  <template>
+    <style>
+      :host {
+        @apply(--layout-horizontal);
+      }
+      .icon-image {
+        border: 1px solid grey;
+        padding: 8px;
+        margin-right: 20px;
+        margin-top: 10px;
+      }
+    </style>
+    <iron-icon class="icon-image" icon="mdi:[[item.value]]"></iron-icon>
+    <paper-input
+      disabled='[[item.secondary]]'
+      label='icon'
+      value='{{item.value}}'>
+      <span slot="prefix">mdi:</span>
+    </paper-input>
+  </template>
+</dom-module>
+
+<script>
+class HaCustomizeIcon extends Polymer.Element {
+
+  static get is() { return 'ha-customize-icon'; }
+
+  static get properties() {
+    return {
+      item: {
+        type: Object,
+        notifies: true,
+      }
+    };
+  }
+}
+customElements.define(HaCustomizeIcon.is, HaCustomizeIcon);
+</script>
diff --git a/panels/config/customize/types/ha-customize-key-value.html b/panels/config/customize/types/ha-customize-key-value.html
new file mode 100644
index 0000000000..8da1eaf5b5
--- /dev/null
+++ b/panels/config/customize/types/ha-customize-key-value.html
@@ -0,0 +1,46 @@
+<link rel='import' href='../../../../bower_components/polymer/polymer-element.html'>
+<link rel='import' href='../../../../bower_components/paper-input/paper-input.html'>
+
+<dom-module id='ha-customize-key-value'>
+  <template>
+    <style>
+      :host {
+        @apply(--layout-horizontal);
+      }
+      paper-input {
+        @apply(--layout-flex);
+      }
+      .key {
+        padding-right: 20px;
+      }
+    </style>
+    <paper-input
+      disabled='[[item.secondary]]'
+      class='key'
+      label='Attribute name'
+      value='{{item.attribute}}'>
+    </paper-input>
+    <paper-input
+      disabled='[[item.secondary]]'
+      label='Attribute value'
+      value='{{item.value}}'>
+    </paper-input>
+  </template>
+</dom-module>
+
+<script>
+class HaCustomizeKeyValue extends Polymer.Element {
+
+  static get is() { return 'ha-customize-key-value'; }
+
+  static get properties() {
+    return {
+      item: {
+        type: Object,
+        notifies: true,
+      }
+    };
+  }
+}
+customElements.define(HaCustomizeKeyValue.is, HaCustomizeKeyValue);
+</script>
diff --git a/panels/config/customize/types/ha-customize-string.html b/panels/config/customize/types/ha-customize-string.html
new file mode 100644
index 0000000000..de243aaf6f
--- /dev/null
+++ b/panels/config/customize/types/ha-customize-string.html
@@ -0,0 +1,33 @@
+<link rel='import' href='../../../../bower_components/polymer/polymer-element.html'>
+<link rel='import' href='../../../../bower_components/paper-input/paper-input.html'>
+
+<dom-module id='ha-customize-string'>
+  <template>
+    <paper-input
+      disabled='[[item.secondary]]'
+      label='[[getLabel(item)]]'
+      value='{{item.value}}'>
+    </paper-input>
+  </template>
+</dom-module>
+
+<script>
+class HaCustomizeString extends Polymer.Element {
+
+  static get is() { return 'ha-customize-string'; }
+
+  static get properties() {
+    return {
+      item: {
+        type: Object,
+        notifies: true,
+      }
+    };
+  }
+
+  getLabel(item) {
+    return item.description + (item.type === 'json' ? ' (JSON formatted)' : '');
+  }
+}
+customElements.define(HaCustomizeString.is, HaCustomizeString);
+</script>
diff --git a/panels/config/dashboard/ha-config-navigation.html b/panels/config/dashboard/ha-config-navigation.html
index fab9232e7c..a02bc9eeaa 100644
--- a/panels/config/dashboard/ha-config-navigation.html
+++ b/panels/config/dashboard/ha-config-navigation.html
@@ -48,6 +48,12 @@ Polymer({
           description: 'Validate your configuration file and control the server.',
           loaded: true,
         },
+        {
+          domain: 'customize',
+          caption: 'Customization',
+          description: 'Customize you entities.',
+          loaded: true,
+        },
         {
           domain: 'automation',
           caption: 'Automation',
diff --git a/panels/config/ha-form-style.html b/panels/config/ha-form-style.html
index b4bf334aed..db104ca8f1 100644
--- a/panels/config/ha-form-style.html
+++ b/panels/config/ha-form-style.html
@@ -12,7 +12,7 @@
       }
 
       .form-group .form-control {
-        @apply(--layout-flex-1);
+        @apply(--layout-flex);
       }
 
       .form-group.vertical {
diff --git a/panels/config/ha-panel-config.html b/panels/config/ha-panel-config.html
index d6d2b876c6..676a43d0d7 100644
--- a/panels/config/ha-panel-config.html
+++ b/panels/config/ha-panel-config.html
@@ -12,6 +12,7 @@
 <link rel="import" href="./automation/ha-config-automation.html">
 <link rel="import" href="./script/ha-config-script.html">
 <link rel="import" href="./zwave/ha-config-zwave.html">
+<link rel="import" href="./customize/ha-config-customize.html">
 
 <dom-module id="ha-panel-config">
   <template>
@@ -78,6 +79,12 @@
         is-wide='[[isWide]]'
       ></ha-config-zwave>
 
+      <ha-config-customize
+        page-name='customize'
+        hass='[[hass]]'
+        is-wide='[[isWide]]'
+      ></ha-config-customize>
+
       <hass-error-screen
         page-name='not-found'
         error='Page not found.'
diff --git a/src/components/ha-attributes.html b/src/components/ha-attributes.html
index 8c6a09b64e..9690716c06 100644
--- a/src/components/ha-attributes.html
+++ b/src/components/ha-attributes.html
@@ -1,7 +1,7 @@
 <link rel="import" href="../../bower_components/polymer/polymer.html">
 
 <link rel="import" href="../../bower_components/iron-flex-layout/iron-flex-layout-classes.html">
-<link rel="import" href="../util/hass-util.html">
+<script src="../util/hass-attributes-util.js"></script>
 
 <dom-module id="ha-attributes">
   <template>
@@ -49,7 +49,7 @@
     },
 
     computeFiltersArray: function (extraFilters) {
-      return window.hassUtil.LOGIC_STATE_ATTRIBUTES + (extraFilters ? extraFilters.split(',') : []);
+      return Object.keys(window.hassAttributeUtil.LOGIC_STATE_ATTRIBUTES) + (extraFilters ? extraFilters.split(',') : []);
     },
 
     computeDisplayAttributes: function (stateObj, filtersArray) {
diff --git a/src/util/hass-attributes-util.js b/src/util/hass-attributes-util.js
new file mode 100644
index 0000000000..7b49262e39
--- /dev/null
+++ b/src/util/hass-attributes-util.js
@@ -0,0 +1,50 @@
+window.hassAttributeUtil = window.hassAttributeUtil || {};
+
+window.hassAttributeUtil.DOMAIN_DEVICE_CLASS = {
+  binary_sensor: [
+    'connectivity', 'light', 'moisture', 'motion', 'occupancy', 'opening',
+    'sound', 'vibration', 'gas', 'power', 'safety', 'smoke', 'cold', 'heat',
+    'moving'],
+  cover: ['garage'],
+};
+
+window.hassAttributeUtil.UNKNOWN_TYPE = 'json';
+window.hassAttributeUtil.ADD_TYPE = 'key-value';
+
+window.hassAttributeUtil.TYPE_TO_TAG = {
+  string: 'ha-customize-string',
+  json: 'ha-customize-string',
+  icon: 'ha-customize-icon',
+  boolean: 'ha-customize-boolean',
+  array: 'ha-customize-array',
+  'key-value': 'ha-customize-key-value',
+};
+
+// Attributes here serve dual purpose:
+// 1) Any key of this object won't be shown in more-info window.
+// 2) Any key which has value other than undefined will appear in customization
+//    config according to its value.
+// TODO: Allow per-domain config, as some attributes are only relevant for some
+// domains.
+window.hassAttributeUtil.LOGIC_STATE_ATTRIBUTES = {
+  entity_picture: undefined,
+  friendly_name: { type: 'string', description: 'Name' },
+  icon: { type: 'icon' },
+  emulated_hue: { type: 'boolean' },
+  emulated_hue_name: { type: 'string' },
+  haaska_hidden: undefined,
+  haaska_name: undefined,
+  homebridge_hidden: { type: 'boolean' },
+  homebridge_name: { type: 'string' },
+  supported_features: undefined,
+  attribution: undefined,
+  custom_ui_state_card: { type: 'string' },
+  device_class: {
+    type: 'array',
+    options: window.hassAttributeUtil.DOMAIN_DEVICE_CLASS,
+    description: 'Device class' },
+  hidden: { type: 'boolean', description: 'Hide from UI' },
+  assumed_state: { type: 'boolean' },
+  initial_state: { type: 'string' },
+  unit_of_measurement: { type: 'string' },
+};
diff --git a/src/util/hass-util.html b/src/util/hass-util.html
index c95314b84f..93a1a1570b 100644
--- a/src/util/hass-util.html
+++ b/src/util/hass-util.html
@@ -34,13 +34,6 @@ window.hassUtil.HIDE_MORE_INFO = [
   'input_select', 'scene', 'script', 'input_slider',
 ];
 
-window.hassUtil.LOGIC_STATE_ATTRIBUTES = [
-  'entity_picture', 'friendly_name', 'icon', 'unit_of_measurement',
-  'emulated_hue', 'emulated_hue_name', 'haaska_hidden', 'haaska_name',
-  'homebridge_hidden', 'homebridge_name', 'supported_features', 'attribution',
-  'custom_ui_state_card', 'device_class',
-];
-
 window.hassUtil.LANGUAGE = navigator.languages ?
   navigator.languages[0] : navigator.language || navigator.userLanguage;