
By default, the trim tool only works on surfaces that have one or more CoS. You are prompted to select the surface twice: first to choose the surface, and then to select the region(s) of the surface you want to keep.

There are no tolerances displayed during the trim operation; instead, the tool uses the settings in the Trim section of
. You will typically tighten these tolerances as shown. Tolerances are described in more detail in the next chapter.

Open the option window to choose untrimming step-by-step for multiple trims, or all trims at once. Don't forget to pick and delete the old curve-on-surface if you no longer need it.
