Updated README

README.md

@@ -140,7 +140,7 @@ stateColors:
 
 There is a special virtual state that is added to all entities, the *multiple* state. This state substitutes an aggregation of multiple states on the timeline when they were merged due to data decimation. Like normal states, you can specify the color for this special state for device classes, domains or globally.
 
-### Theming the UI 
+### Configuring the UI 
 
 #### Dark mode
 
@@ -163,6 +163,18 @@ uiColors:
   labels: green
   buttons: '#80f00050'
 ```
+
+#### Changing the UI layout
+
+The position of the time control toolbar and the entity selector can be customized through YAML settings:
+
+```yaml
+type: custom:history-explorer-card
+uiLayout:
+  toolbar: top
+  selector: bottom
+```
+Possible options are `top`, `bottom`, `both` and `hide`. When selecting `both`, the UI element will be duplicated and shown both on top and on the bottom. This is useful on large histories that require a lot of vertical scrolling. When `hide` is selected, the respective UI element is not shown.
 
 ### YAML configuration for preconfigured graphs