Cut to much of a page? Fix it!

It happened several times to me that I measured something wrong, and I cut the paper in a smaller way that what I was supposed to! I didn't like to have to cut another paper, because I didn't want to waste paper.

So, I learned I could mend my mistake. What I would do is that I would grab what I had left of the cut paper, and I would paste it into the one that had turned out too small. I don't know if I'm explaining my self well, so I will draw it :P. Well, the thing is that when I had pasted the papers in the way they were supposed to be cut, I would paste something else in the top of them, so that you couldn't notice they were two papers, so as to see them as one.

Instructions :)!

This is an example of what I'm talking. I make the mistake of cutting this page a little smaller than what it was supposed to be, so I pasted another piece under it and then I covered it with a strip of light blue paper.