Mark,
When you do the divide function. It actually takes the line and makes it into seperate lines. Say for instance you did a 4 dot divide. Then there would be 5 seperate lines.
So now if you want to set for example rafters. All you have to do is select the rafter you want to copy .
But when you select....zoom in until you have grabbed the center of the rafter at the same point you put the line you divided. Now all you have to do is slide the rafter down the line (kinda slowly) and watch for it to say "END OF LINE". When you reach that point on the line it will be at one of the points you had a red dot at. If you watch your measurements in the lower right had screen you can tell when you are close then just watch for the "END of Line" and left click. Your rafter will now be OC on the red dot. You can move all the way down the line that way just move/copy and select.
BTW if you find it difficult to find the center of the rafter or that involves to much orbiting around you can also just move it from the corner of the rafter then select on the "end of Line" then if its a 8" rafter, just move it another 4"s then you would also be OC.
