Rotating multiple lines of text 90 degrees all at once

I have to build a lot of bar charts (vertical bars). Sometimes the identifying text that goes over each bar is too long, so I have to rotate the text 90 degrees to fit in the bar. I then have to do this for ALL the bars, so that the text is all facing the same way. I would like to figure out a way to rotate all the text at once. When I try to do it, it stacks the text… which I don’t want it to do. This probably doesn’t make sense, so I’m attaching a screenshot. You can see the two red numbers on the left have been rotated manually (I do have a keyboard shortcut to do this, but I still have to do it to EACH number separately). The red numbers on the right haven’t been rotated yet. And of course I haven’t aligned them over the bars. That’s the next step. Anyway, if you have any ideas, please let me know. Thanks!