Arrow keys move the picked objects one point (with Shift, ten). Delete removes them. Enter works on a picked group's parts, or adds one with a drawing tool. P is the Pen, A edits the points of a picked outline: there, N picks the next point and the arrow keys move it. Escape goes back to Select, leaves a group, or picks nothing. Shift+F10 opens the menu. Pick objects in the timeline's layers list.
Up and Down arrows move and pick, with Shift they add to the picked ones. Right and Left open and close a layer or group. Space adds or removes the row from the picked ones. F2 renames. H hides a layer while editing, L locks it. Alt with Up or Down moves forward or back. Delete deletes. Enter goes to the stage.
Left and Right arrows move one frame, Shift with them one second. Home and End go to the start and the end. Page Up and Page Down jump to the picked object's previous and next keyframe, or to markers when nothing is picked. Alt with Left or Right moves the keyframe under the play head. K adds a keyframe, Delete removes it. M adds a marker. Space or Enter plays and pauses.