tool bar icon is too small

[krkrchan]

maybe it is related to system settings, for I use 175% scaling.

[Beelink]

Hi,
Thank you for the issue report.
This issue is already known but there is no easy way to fix this behavior.
The app has bad HiDPI support. I will try to fix this issue in future updates.
Related GitHub issue: ModuleArt/quick-picture-viewer#21