- set_opacity("previous", can_go_previous() ? global_default_opacity : 0.1);
- set_opacity("next", can_go_next() ? global_default_opacity : 0.1);
+ set_opacity("previous", can_go_previous() ? global_default_opacity : global_disabled_opacity);
+ set_opacity("next", can_go_next() ? global_default_opacity : global_disabled_opacity);