How to scale ui of the program?

[dustdfg]

How to scale ui of the program? It is too tiny...

[bjorn]

There's likely some environment variables you can use to help with this, see https://doc.qt.io/qt-6/highdpi.html#environment-variable-reference.

However, please do provide more details about your OS and maybe some screenshots. Maybe it is a problem that can be addressed without needing workarounds.

[dustdfg]

I just tried QT_FONT_DPI. No effect. I am almost sure I need scaling not in the sense of DPI auto adjusting but in the sense of accessibility feature

[bjorn]

Hmm, I've never seen QT_FONT_DPI not having any effect... What value did you try setting it to? Something like QT_FONT_DPI=192 should make for quite large fonts / UI.

[dustdfg]

Honestly, I tried QT_FONT_DPI=2 but 192 also don't have effect...

[bjorn]

@dustdfg You can set an environment variable for a child process using either:

$ export QT_FONT_DPI=196
$ tiled

Or:

$ QT_FONT_DPI=196 tiled

Otherwise, you're only changing the value for the terminal itself.

[dustdfg]

Xwayland can affect the scaling of applications, particularly if you're using a scaled display on Wayland.

If you can, try using native Wayland. If you still have issues, try setting QT_AUTO_SCREEN_SCALE_FACTOR=1.

I just tried to disable Xwayland. The result is same. Using QT_AUTO_SCREEN_SCALE_FACTOR=1 with or without enabled Xwayland didn't have an impact

About wayland display scaling. Sway distributed as debain12 package doesn't support fractional scaling so I used any other workarounds like increase font size of the bar and etc. but scaling factor of the display is 1

[dustdfg]

QT_FONT_DPI=196 tiled

Yeah, I am a fool. I tried this form too but I added ; between out of habit. Thank you @bjorn