== User Story
As a logged-in user on a test wiki, I want an easy way to turn the desktop improvements off in case I don't like the new changes
== Acceptance criteria
[] link will display **in the sidebar** in the following cases:
- Logged-in users on test wikis (with a vector version preference NOT set to Legacy Vector - default state)
- Logged-in users on other wikis (with a vector version preference NOT set to Legacy Vector - non-default state)
[] Copy: "Switch to old look"
[] Selecting the link will take user to the appearances tab in preferences
[] Link should contain a provenance parameter in the query string for tracking clicks (https://wikitech.wikimedia.org/wiki/Provenance)
=== Design
note: copy should read "switch to old look"
{F31646050 width=300}
== QA
**beta cluster March 30, 2020**
1. log in to beta cluster
2. Click the link in the sidebar
3. ensure link takes you to skins section of preferences
4 select legacy mode checkbox and save
5. ensure link is no longer present
6. select legacy mode
**production April 1, 2020**
1. log in to hewiki
2. ensure no link is present in the sidebar
3. ensure no changes have been made to appearance tab (no legacy checkbox)
4. double-check for any visual regressions