Install theme

xbps-install -Sy lxappearance

all theme store in

ls /usr/share/themes

lxappearance show standard themes without

one or this tow repo

xbps-install -Sy gnome-themes-standard
xbps-install -Sy gtk-engine-murrine

compile some theme by messon

xbps-install -Sy sassc glib-devel

cursor

xbps-install -Sy breeze-purple-cursor-theme

gtk debug error

# if you export this var like that:
export GTK_DEBUG="interactive"

# to disable one time
unset GTK_DEBUG

# or from .bashrc to disable it completely
unset export GTK_DEBUG="interactive"