| Scroll | Navigate slices |
| Shift + Scroll | Zoom (to cursor) |
| Shift + Drag | Pan (when zoomed) |
| Double-click | Reset zoom/pan |
| + / - | Zoom in/out |
| Arrow keys | Navigate slices |
| Escape | Close tour/dialog, clear rectangle |
| Tools (Tape/Arrow/Box/Ellipse/Text) | Left-drag to mark; click a mark to delete |
| 3D mode click | Set crosshair position |
| Right-drag | Adjust W/L (↔ window, ↕ level) |
| Double right-click | Reset W/L |