How to rebuild the theme registry on every page? I returned to Drupal 7 after a short absence, and couldn't find the option to "Rebuild the theme registry on every page", which is useful while editing templates on a development site. I thought it was in the Performance options but I can't find it there, and searching for it gives unclear or out of date results, mostly around the Zen theme which I haven't used for years. I've definitely used this setting without using Zen.

Where's the Drupal option to rebuid the theme registry on every page?
This isn't included in stock Drupal 7. 

If you're not using Zen, the most common way to access this feature is via the module Devel. 

Then it's accessible from /admin/config/development/devel, right down the bottom of the page.