Delete selected 
This button allows you to delete the selected lines, curves,
or points that were created on the drawing during the measurements, without
deleting the entire measurement (See Drawings/Delete measurement ). Click on the drawing at any point of the
measurement layer you wish to delete, and then click the ‘Delete selected’
button.
Deleting selected areas is accompanied
by the update of the relevant measurements results in both ‘Drawings’ and ‘WBS’
tab tree views.
Besides
measurements, you can also select and delete measurement regions and analysis
regions.