To copy and paste in drafts you select what you want to copy, then right click copy and right click paste. It is gonna be pasted in the same exact spot so you have to drag it to place it in different position. Hope that helps.
Not sure we are on the same page here. I mean to copy a sheet a part or print would be on such as sheet a, sheet b. Then paste it as a new sheet. Right clicking the sheet tab does not give me a copy option.
For that you have to copy and paste the drawing the background separately. You open a new empty sheet of the size you want. Select all with crtl+A and paste your drawing into the new sheet. Then go to your original drawing and go to "View" Tab on top then select "background" in "sheet views" tab and deselect "working". That would enable you to select copy and paste the background. to the new sheet.