said Dr. Nikolaus Klepp via tde-users:
| DPI settings are in the "fonts" section of kcontrol. You'd also need to | set "Xft.dpi" in ~/.Xresources, too. And you'll need to to tweak the GTK | settings with lxappearance. Also some applations need $GDK_DPI_SCALE and | $QT_FONT_DPI. And at last you'll need to set a xcursor theme and size.
Perhaps inspired by having owned the machine ib question -- an original GPD Pocket -- Raster has put the controls front and center in Enlightenment. The screen setting has 90, 180, 270 degrees of rotation, and a very good scaling option completely separate from fonts.
(I may end up using E on the machine. I tried TDE on it when I first got it, but for reasons I don't remember it didn't work. Might be fixed, but if not I'll have E as a fallback. It ran Plasma okay, but every time I use Plasma I dislike it more.)