When the layers are extended, tap on the timeline to minimise the layers and have more space to navigate.
Drag left and right to flip through the content in the timeline.
Double-tap on a sheet in the timeline to select it. When one or several sheets are selected, the action panel is displayed on the right of the screen, above the timeline.
Tap on the cog to display all the options available in the action panel. Tap on 
to see the description of every option. When a sheet is selected, dragging on the side arrows increases or decreases the size (duration) of the sheet.
A double-tap followed by dragging on the timeline allows you to select multiple sheets on multiple layers.
Pinch 2 fingers apart to zoom-in, and pinch them together to zoom-out.
Drag with one finger left and right to navigate in the timeline.
Slice down on a drawing sheet to cut it in two.
The second drawing sheet will keep the content.
Slice up on a drawing sheet to cut it in two.
The second drawing sheet will be empty.
