I am surprised no one had brought this up. When starting in the trades, I learned to use a tape upside down. So did everyone else. It wasn't an option, unless you were left handed. Think about it; if the majority of your dexterity lies in your right hand, this will make perfect sense.
Hold the tape in your left hand, hook the blade (you may have to slide it out many, many feet when framing a roof or other tasks) after carefully guiding the hook to the end of the board. You extend the tape and mark with your right hand, the hand you write with and perform other detailed tasks. Slip the hook up on the tape, and while it is retracting in your left hand, put your pencil behind your ear, then get your speed square with your right hand. It's all one big motion. You never locked the tape; it was held in your left hand just long enough to make your mark.
((At this same time, you learn to cut with the shoe of the saw on the board, not the motor side. This allows you to see EXACTLY the point of contact and the accuracy of the cut. Plus, you don't have to change sides from where you measured.))
It was not taught to measure left to right. To do that, you had to hook the tape, extend it where you need it (so far, so good) but then there was monkey motion in getting the tape locked with your right hand, retrieving the pencil with the right hand after locking the tape, balancing the tape on the material to be cut, marking, then unlocking the tape (which you would do with your right hand, which should be putting the pencil behind your ear and reaching for the square) and then finally get to the speed square for your saw line.
Too much activity for a cut, and imagine all that over the course of cutting all day. Not to mention all the times the tape will fall over (which it never does when you are holding it in your left hand) or you lose your hook if you bump your material or the tape slips when locked. Then you have to start over with your measuring.
If you could mark perfectly every single time with your left hand (mine is an untrained idiot), you were allowed to measure left to right. But if you were slow, clumsy, or needed more practice in your cutting motion, you went back to being a mule.
I decided to learn as I was taught. Being the "saw man" was a step up in job site status, plus when I was cutting the headers, rafters, joists, bucks, etc., was sure a lot easier than having to haul them all day as a laborer.
With almost 40 years of that in mind, I read my tapes upside down, and can't easily decipher any tape that has too much stuff on it. I was confounded years ago when the fractionalized tapes came out as the clutter confused my dull mind. And I think it was soon discovered that in the industry that "2 little sticks" was the common description of 1/8" for some, and I even had helpers tell me that the fractions they saw on a tape were "for something else". What, they didn't know. Maybe something scientific. Baking, perhaps?
I was glad when that trend subsided. But the advent of combo metric tape measures a few years ago muddied the water for me again. Now most tapes I see are covered with unneeded and unwanted information and if I don't have my glasses, sometimes I am up against it with smaller tapes.
I don't want much. Sometimes I just want a long, retracting ruler with one scale on it. I have them and can find them, but I just wouldn't think it would be a challenge to do so.
Robert