The following navigation, activation and selection keyboard bindings on StringSpinner need verification for proper operation and key binding sequences.

StringSpinner
Navigate in - Tab
Navigate out - Tab, Shift+Tab (reverses direction)
  Change value -
U/D Arrow Keys
Home = move to minimum most value
end = move to maximum most value
Pgup, Ctrl+Pgup = Big jump in the left/top direction
(~20% of scale)
Pgdn, Ctrl+Pgdn = Big jump in the right/bottom direction
(~20% of scale)