Just change to 16px.
I also thought of something related to HighDPI, so you can:
a) do nothing (any user can fix it for themselves via qss)
b) however, change it to 16px
c) wait for the posts of other beta2 users on Windows, whether they see tiny icons and whether adding code to qss improves the situation:
Code:
QDockWidget::float-button, QDockWidget::close-button {
icon-size: 16px;
}
On screenshot from BetterRed we see tiny icons:
https://www.mobileread.com/forums/sh...4&postcount=32