Zoom the screen with Alt+Scroll in KDE

Install xbindkeys, qdbus.

Enable KWin zoom effect. For best experience, lower the zoom multiplier.

Add this to .xbindkeysrc in your home folder (or create the file):

~/.xbindkeysrc
"qdbus org.kde.kglobalaccel /component/kwin invokeShortcut view_zoom_in" alt + b:4 "qdbus org.kde.kglobalaccel /component/kwin invokeShortcut view_zoom_out" alt + b:5

It is possible that qdbus is available under a different name, like qdbus-qt4. Try the command itself (without quotes) and see if it has any effect.

Alternatively, with dbus-send:

~/.xbindkeysrc
"dbus-send --type=method_call --dest=org.kde.kglobalaccel /component/kwin org.kde.kglobalaccel.Component.invokeShortcut string:view_zoom_in" alt + b:4 "dbus-send --type=method_call --dest=org.kde.kglobalaccel /component/kwin org.kde.kglobalaccel.Component.invokeShortcut string:view_zoom_out" alt + b:5

You may want a different modifier. For Meta/Super key, replace alt with m:0x50 + c:133.

Then activate xbindkeys:

killall xbindkeys
xbindkeys

Add xbindkeys to startup.


References:

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