Map border not lined up with Snap after scale
Ahoy all, I've been working on a transport map and needed to increase the size of it on one side to accommodate all the station stops on that side. I managed to use non-visual scale to make the "canvas" larger only on the left side (a feat I can't seem to duplicate now, no matter where I put the "scale center", both the left and right sides are changed... not sure how I did it the first time to make it so that ONLY the left side got bigger).
However, what I didn't anticipate is that this would alter how it interacts with my snap grid. Basically, if I go to Distance measure, with snaps on the curser will no longer snap perfectly to the corner of the map background. It will snap just to the left of it or just to the right of it.
This type of math is not my strong suit at all. How can I figure out exactly what degree of scaling to apply to restore this so that the left side of the map border is once again lined up with my snap grid (which is a 5-point grid with 4 snaps, so each snap movement is 1.25)?
Furthermore, there must be a way to make only the left or right side change because the left side of the canvas got bigger but the right side didn't when I first scaled this, but now I can't do that again. When using non-visual X/Y scale, where do I want to put the scale center based on which sides I want to change by how much? And while scaling up is obvious (if I put in 1.25 it will become 25% bigger), scaling down is giving me trouble. Scaling by 0.5 will cut it in half, but beyond that... My original scale-up was by 1.05. How would I figure out what number to use to scale it back down by exactly the same amount?
Like I said, this kind of math just makes my head spin, lol. Thanks for any and all help!