Am working with v5, pro.  I want to print my layout on 11x17 tabloid paper on a HP large format printer(9800).  Choosing "page setup: Set scale to 300%" "Close".  Choosing "print and set zoom factor to 1:25"  This will enlarge print size but still leaves a 1 ½ inch border all the way around on the paper.  By making the layout as large as possible, I can then use it for my control panel.  
I have noticed some comments that we can't edit the size dimensions.  If that would change I believe we could enlarge  the print dimension to eliminate the 1 1/2 inch border.
So far I like what I see.  Any plans to add electric symbols?  
George