By default the “system” cursor theme is used. This makes GTK prefer cursors that Windows currently uses, falling back to Adwaita cursors and (as the last resort) built-in X cursors.
When any other cursor theme is used, GTK will prefer cursors from that theme, falling back to Windows cursors and built-in X cursors.
Theme can be changed by setting
gtk-cursor-theme-name GTK setting. Users can
override GTK settings in the settings.ini file
or at runtime in the GTK Inspector.
Themes are loaded from normal Windows variants of the XDG
locations: ,
HOME%/icons/THEME/cursors,
APPDATA%/icons/THEME/cursorsRUNTIME_PREFIX/share/icons/THEME/cursors
The gtk-cursor-theme-size setting is ignored,
GTK will use the cursor size that Windows tells it to use.