Sometimes the architect forgets to label the pitches on a roof. You can easily find unlabeled pitches using the Pitch Finder tool in PlanTek PlanTek is a fully paperless plan management software developed specifically for designers, and integrates with MiTek's eFrame software.. Please make sure the plan has been leveled if it was not scanned in perfectly level, since the pitch finder will be inaccurate if the page is not level.
First locate the unlabeled location and zoom to
appropriate depth.
Now select the Pitch
/ Angle Finder button 
from the toolbar.
Next click any two points on the sloped roof to
calculate the pitch.
The Angle / Pitch Finder dialog appears.
Click OK to continue.
See demo video of finding and Angle or Pitch