It's really the only downside to this ruler. I never play on full screen, I use the popup screen that first comes on when you click play now. In this way, there's a space below the screen. I move mine, after lining it up, just below the popup, as high as I can without it hiding the numbers. This way, you only have to look down about an inch or less below your actual meter. It makes it to where you're usually within a pixel if not right on to where you want. That's why I said that the line on the ruler can be moved so you know where you need to stop.
There is another positive in all of this. Once you line up the ruler where you want it, it will always stay in the exact spot on the screen that you need as long as you don't move the golf window and also that you close out the ruler by right clicking the window icon at the bottom of your screen.
Just try to get it as close as possible and remember to use the line that slides back and forth on the ruler. All you have to do to keep the line where you want it is to drag your mouse icon off the bottom of the ruler.
Some people will use other rulers that are directly above the meter, but they don't work with me because I always use the higher distance putters. I do this because of a tip I read on this forum where the further you pull back the meter, the faster it speeds up and is harder for me to stop it where I want either before or after the ding line. This way I only use the bottom third to a quarter of the meter.
The ruler that I use that I describe here allows me to use the longer putters and use the line I described on the ruler to figure out exactly where to stop it. You just have to use a bit of math to figure out exactly on the ruler you need to put the line. This ruler as I've described here has worked wonders for me once you get used to it. I recommend ANY ruler that helps you. I just find this works best for my needs.