Users can create and maintain layers as they annotate the document. Layers can be shown, hidden or deleted.
Users can tap on the move icon at the top of the toolbar in order to move the toolbar to another location on the screen.
When a user taps on a main function, it expands to show sub functions, if applicable. As with the move icon, when an item is selected, the icon and background colors are inverted.
As illustrated here, the shape function expands just like the pen does. Users can adjust the color and opacity of the shape. (When users manipulate the slider, the opacity display adjusts).