My guess about the ideographs being Japanese being correct, it seems.
I had to use a machine translator, I don't speak or read any Japanese.
But icon sizes are a system setting, and not under control of individual applications.
Just right-click on the desktop, select "View", and there "medium icons" or "large icons".
Hi @Y_INO ,
yes, you can change the toolbar icon size with changing the DPI settings, see https://mcuoneclipse.com/2017/10/11/dealing-with-eclipse-and-very-small-icons-on-ultra-high-density-...
I hope this helps,
Erich