First of all - choose finger placement. Two unstandard fingerings for lefthanders and right-handed persons in addition to two standard fingering placements
then choose your keyboard model from different types with different Enter, Backspace and Backslash keys configurations
after it choose background color from white, gray and black
and at last choose options: enable or disable auto hide/show, hide timeout and keyboard opacity, also you can turn off the coloring of keys and enable auto run program when Windows start
All the settings including size and position of on-screen keyboard are be automatically saved and applied when next program run.