SkinSwitchButton is script for changing skins with one-click.
for Pseudo-Vector, the button will show in the editing toolbar on the top,
for Oasis, the button will show in the toolbar below.
How to use
In order to use this, put it in your w:Special:MyPage/global.js or your local js on a specific wiki. A helpful guide can be found here.
Follow the following instructions:
The ability to choose the wording of the Oasis text can be adjusted like this: