CURTA

Registers

Operate

View

Demonstrations (from the Contina manual)

× Mouse — drag empty space to orbit · wheel to zoom · right-drag to pan
Drag setting knobs up/down · the crank knob clockwise · the carriage sideways · the clearing ring around
Click crank hub = pull up/push down (subtract) · reversing lever · decimal-marker gaps · lever pivot = fold lever
Keys Space turn · S subtract · ←/→ carriage · R reversing lever · C clear · X view mode