On my 13 inch screen with 3200x1800px I adapted all fonts to 230 dpi which is ok in most cases.
Also in Settings, I could change Icons of the KDE Theme to 64px.
Only the Icons in the status bar at the bottom right corner (velocity, Network,...) are still only about 16x16 px, which is barely readable. They seem not to obey the same rule.
Where can I change them?
The setting to change icon sizes, located in Settings > Appearance > Icons > Advanced, seems to have been unusable for years, as you've noted in your question. This appears to have been the case since some version of KDE 4. Possibly it is related to whether the icon theme is in a resolution-independent format.
A hidden
iconSize
system tray setting was added around plasma-workspace 5.9. Prior to the addition of this setting,qml
files had to be edited.For a standard plasma panel, open
$HOME/.config/plasma-org.kde.plasma.desktop-appletsrc
in the text editor of your choice. If you are using Latte Dock, open the$HOME/.config/latte/*.layout.latte
that corresponds to the layout you are using.Look for the entry that corresponds to the system tray. It will look something like this:
Then scroll down until you see something that looks like this:
Then add:
Where
#
is a number that refers to one of the following options:To see the changes log off and on. Or, in a terminal, kill and restart
plasmashell
:Or
latte-dock
...It can be adjusted in Settings > Appearance
At the bottom of the window there is a slider for Launcher Icon Size.
Set accordingly