Hi janetem
You can submit feature requests here:
http://sourceforge.net/tracker/?atid=1433847&group_id=342582Re - Dimensions, you can set up a layer with defined attributes such as Colour, Line weight and line type and use this layer to insert all your dimensions. If all dimensions are all on the same layer you can turn on and off the dimensions when you like and modify all (or single) to suit!
Hope this helps