Hi Just started working on a PC with Acad 2004 and it's displaying a wierd habit of creating zero line lengths unless you zoom in really close to the area you're working in. To draw a 5mm line I sometimes have to zoom in untill the drawing window represents approx 25mm. The same problem exists with moving grips but then I have to zoom in even closer ?? Is there a variable that I should know about? TIA for any help Tim