Deleting points

My aged boss and I are trying to learn DesignCad together. I scanned some
diagrams of our product, cleaned it up in another program and exported them
as a dxf. When I import them in DesignCad, I have more points that I need.
Cannot for the life of me figure out how you can delete points in the middle
of a line after it has been created. Yes I can push the esc button and erase
one at a time while I am creating a line but not afterwards.
Please help this newbie. Or does this program not let you do this?
Thanks for any suggestions you can give me,
Paulette