... : 1. right-click on the file: TemplotV00Demo.exe 2. click Properties. 3. click Compatibility tab. 4. click Change high DPI settings button. 5. tick box "Override high DPI scaling behaviour". It should then look crisp when next run. (The same works on any other old programs which look fuzzy in Windows 10.) If you click the up-down arrows in the top-left corner of each window, up and down once, it should sort out the window sizes: 2_020609_580000000.png p.s. the "keeps box" is now the "storage box". I was persuaded to change the name by Brian Lewis of C&L, and have regretted it ever since. Too late now. The above window was called the "control room" and is now the "main program panel". N.B. you will probably notice high CPU usage and a hit to a laptop battery. When closing the program, my system goes unresponsive for a few seconds -- I've no idea what Templot is ...