Sets the cairo_font_options_t used for Pango rendering in this widget. When not set, the default font options for the gdk.Screen will be used.
a cairo_font_options_t, or NULL to unset any previously set default font options.
3.18
Sets the cairo_font_options_t used for Pango rendering in this widget. When not set, the default font options for the gdk.Screen will be used.