Important: Keyboard shortcuts affect the area under the mouse pointer.

Main

The program has 3 main window areas which are dragable by grabbing the crossbars. To quickly move the crossbars, position the mouse pointer over the one you wish to move, it should turn into a drag pointer.
Press enter to position it in the middle.
Press the up/down/left/right arrow keys for the extreme positions.

Track Displa / Arrangement View

Position the mouse pointer over a track.
Press down arrow to move the track down.
Press up arrow to move the track up.
Press enter to make the track the current track.
Press home key to go to the very beginning of the track.
Press end key to go to the very end.
Press the left arrow key to go to the previous visible key frame.
Press the right arrow key to go to the next visible key frame.
Press i to zoom in.
Press o to zoom out.
Press a to see all.

Project Tree View (Project tab, bottom left)

Position the mouse pointer over the track name.
Press the ctrl key and click a track to toggle the visibility in the track display.
Click a track to make it current.
Press up arrow to move up.
Press down arrow to move down.
Press delete key to delete the track.
Press shift key and click a track to select it and all its children.

Variables List (Vars tab, bottom left)

Position the mouse pointer over any variable name.
Press space bar to make a variable the active one
Press + to add a key frame.
Press - to delete a key frame.
Press enter for the default value.
Press up key for maximum value.
Press down key for minimum value.

Selections

When you are selecting an area of a media clip or project in the import, wave or track display, position the current time indicator (with slider) at the correct position and
Press s for start of selection
Press e for end of selection.
Press esc to remove selection altogether.
There are also buttons for these functions and more below the track display.