## Working with CAD Surfaces

When creating scans you often need to select one or more surfaces that you want PC-DMIS to scan. Selected surfaces are shown in a red highlight color:

A Selected Surface

Sometimes you will make a mistake and will need to deselect surfaces as well. Rather than redefining the entire scan because you selected an incorrect surface, you can now deselect the desired CAD elements in the Graphics Display window for any scan that requires you to select surfaces. Previously, you could only do this with Section scans.

To deselect (or select) a desired surface:

1. Ensure that your part is displaying surface data by selecting the Toggle Graphics Window in Solid icon from the Graphic View toolbar.

2. Access the appropriate scan dialog box and start defining the scan.

3. As needed, press the CTRL key, and click the left-mouse button on the desired surface in the Graphics Display window. PC-DMIS will toggle the selection state of the surface.