Best solution for reading small fonts or small map characters is to use a magnifyng glass software. Windows OS has one, but there is a much better one which you can use by simply pressing CTRL and using your mouse wheel in any program launched in Window Mode. Also there will be no nasty icon onscreen all the time. Very well suited for SH series, programs with small fonts, or while browsing webpages.
It's called Glassbrick and can be found here:
https://www.softpedia.com/get/Deskto...assbrick.shtml
Just launch the x64 program if you have a 64-Bit OS, no need to do any settings, the program icon will be visible in your task bar. Set SH5 to be launched in Window Mode (Glassbrick will not work in fullscreen mode), then everytime you want something to appear bigger: press CTRL while using your Mousewheel to enlarge or shrink the screen. That's it! Besides, the program has a lot of settings, to see the settings menu: right-click the program icon in the task bar and chose "Settings".
I hope this helps!