No way for us users to change this unless you lower the resolution size that RailWorks displays at, or get a bigger monitor, or reading-glasses

But yeah, I find, especially when working with the editor now, the text size is way too small, and now I have to lean in close to read the text or see the numbers. I sent off a nice email to RailWorks support in regards to about this and a few other things.
Send RailWorks support an email, as the more voices they hear about the text now being too small, then hopefully they will decide to give us RailWorks Users an option to set the text size as we want to something larger.