Having created your solid object. Go to the File new\drawing
then on the detail tab, you can set the size of paper, add dimensions. To remove the sold green etc go to the display tab
select hidden line removed etc. You will need to SELECT the dotted line around the shape, just keep moving your cursor until it show, then back to the display tab and select colour = black
if you want to print and have true line weight being shown, then again on DISPLAY there is show lineweight