*** 2D-Offset Operations ***

Middle mouse button down and mouse-move to change scan offsets

Ctrl down and mouse move to show cursors

Ctrl-1/Ctrl-2 to select/deselect scan for highlighting

Shift Zoom to deselect scans and hence perform a Zoom


*** General scan window operations *** 

Shift Unzoom to select all scans for display, x-axis left unchanged

Shift-1/Shift-2 displays next/previous scan, x-axis unchanged

Mousewheel scroll with Shift-key-down to contract/expand x-axis

RMB down and mouse move for panning



