Key Description
←, ↑, →, ↓ Move the selected control point in the direction of the arrow
ctrl-←, ctrl -↑, ctrl -→, ctrl -↓ Select the nearest control point in the direction of the arrow
shift-←,shift-↑, shift-→,shift-↓ Move the whole checker board pattern in the direction of the arrow (lens shift)
B Blank the currently selected map
shift-B Blank all but the currently selected map
ESC Exit configuration overlay screen
F1, F2 Remove/add horizontal control points
F3, F4 Remove/add vertical control points
L Load configuration from the last saved file
M Toggle curved or linear mapping
space Cycle through the alignment patterns
R Reset all settings to default
S Save configuration
Tab Selects the next control point
shift-Tab Selects the previous control point
U, ctrl-Z Undo
shift-U, ctrl-Y Redo
Z Show/Hide the control points
+, - Zoom in/out (coarse adjustment)
shift-+, shift-- Zoom in/out (fine adjustment)