This is a quick reference to every mouse control and keyboard shortcut in the CustoMED viewer and editor, whether you are reviewing segmentation or planning. For the editor layout and tools, see The Editor & Viewer. For more speed tips, see Working Faster in the Editor.
3D view
Action | How |
Rotate | Left-click and drag (touch: drag with one finger) |
Pan | Right-click and drag |
Zoom | Mouse wheel, or middle-click and drag (touch: pinch) |
Select an element | Click it |
Standard view | Click Sagittal, Coronal or Axial. Click it again to see the opposite side. |
CT slice views (Axial, Coronal, Sagittal)
Action | How |
Move through slices | Mouse wheel, one slice per step (off in Average mode) |
Pan, zoom or adjust Window/Level | Choose the tool above the views, then left-click and drag. Pan is the default. |
Adjust Window/Level at any time | Right-click and drag: left and right changes the width, up and down changes the level |
Center the other views on a point | Click the point |
Maximize or restore a view | Double-click it, or use the maximize button |
Note: In the slice views the mouse wheel scrolls slices, it does not zoom. To zoom a slice, select the Zoom tool and drag.
Keyboard shortcuts in the editor
Key | What it does |
Ctrl+Z (Cmd+Z on Mac) | Undo the last change. There is no redo. |
Arrow keys | Nudge the selected element 0.5 mm |
Esc | Clear the selection, cancel a measurement you are placing, restore a maximized view or exit full screen |
Shortcuts don't work while you are typing in a text field.
Measurement values
Key | What it does |
Enter | Apply the value you typed |
Up and Down arrows | Step the value up or down (Left and Right for side-by-side values) |
Double-click a measurement title | Rename a measurement you added. Enter saves, Esc cancels, Tab moves to the description. |
Comments
Key | What it does |
Enter or Ctrl+Enter (Cmd+Enter on Mac) | Send the comment |
Shift+Enter | Start a new line |
@ | Mention a teammate. Use the Up and Down arrows and Enter to pick a name. |
Esc | Close the mention list, then the comment, then the comments panel |
Make the most of the four-view layout
Maximize a single view when you need detail, then restore the grid to keep spatial context.
Cross-reference: what's unclear in 3D is often obvious in the axial, coronal and sagittal slices.
Full screen
Click Maximize screen in the header to hide the browser chrome and give the views maximum space, ideal on a smaller laptop screen. Press Esc to exit.
Go hands-free with CORA
Say "zoom in", "next slice", "reset the view" or "hide the tibia" to control the viewer without touching the mouse. See What CORA Can Do.

