Whenever I need to stretch nodes on tendons, a common occurrence because architects cannot make up their minds, Concept slows down the more nodes I stretch. It will get to the point where I have to shut down Concept and restart. Any ideas?
See if either of the following helps:
1. Check for and install any updated video drivers from your machine manufacturer's web page.
2. Click on Help - User Settings and set the Graphics Acceleration to None. Then, close and reopen the program and see if the same problem occurs.