# Snapping to hot spots

Measurement tools, such as the Ruler, Marker and Protractor, snap to various points of interest on parts from the motion, optics and waves areas of the software. These points are called hot spots. Drag the measurement tool around the scene to reveal the hot spots present on parts from the motion, optics and wave areas.

Link the measurement tool to a hot spot by dragging one end on to the hot spot.

## See also:

- Ruler
- Marker
- Protractor