Draw a polygon to determine which part of the volume will be shown.
Take the following steps:
1. Click Isolate
in the Patient Mask toolbar. Alternatively, use the
keyboard shortcut [I].
2. When hovering
over the 3D viewer, the cursor will change into
.
3. Start drawing a polygon over the part of the model you want to be isolated.
‒ Click on the model with the left mouse button to create a point.
‒ Move the mouse and click to create a second point. The two points are linked with a green dotted line.

‒ Click on the model to create a third point. The green dotted line will change into a polygon.

‒ Continue marking points until you have enclosed everything you want to isolate.

4. Right-click, or press [Enter], to finish.
5. Everything outside the polygon is removed from the displayed volume.
6. Click Finish to apply the changes to the model.