Hi, I'm new to Draftsight and a former Autocad user for many years, albeit in 2D. I generally use another 3D CAD system but use 2D CAD to print and send PDF files to customers. I have done this very successfully so far but have encountered the following issue:  I accidentally pressed the Control button and the view changed to a 3D one. Unfortunately, I pressed the saved button and the 'undo' button was greyed out. Is there a quick way to get back to a 2D view?