Click a button in the list at the bottom left and select the Arrangement tab to configure different pictures for button states.

For each state of the boolean control, select in the list which picture you want to display.

A preview is displayed for each state.

Click the "Change Pictures" button to modify which pictures are available to your button design.

Use pictures in the Picture Library and add them to your button design. Keep in mind that you cannot have more than 6 pictures per button.

Click the "Delete" button to remove pictures from your design.

Once you've configured the correct pictures for each state of your buttons, continue with configuring Colors