Category in Advanced options dialog: Model views

Set this advanced option to FALSE (default) to have cut faces shown in gray, and to TRUE to show the cut faces with the same color as the other object faces.

You need to redraw the model view after changing the value for the change to take effect.

This advanced option is user specific and the setting is saved in options.bin under the user folder, for example, in C:\Users\<user>\AppData\Local\Trimble\Tekla Structures\<version>\UserSettings.