I recently installed draftsight vers 10.11.601 and my mouse slows down whenever the cursor is in the DS model view.  If the mouse is over the property screen, menu bars, or anywhere else on the DS window it moves fine but lags over the drawing window.  I am running Win 7 - 64 bit, with an NVidia Quadro FX1700 video card, and 4 GB of ram.  I'm sure that I just need to change a setting in DS to fix this, any ideas?