# Test mode **URL:** \ **Category:** Feature Requests\ **Created:** [July 17, 2020, 6:34am UTC](https://community.glideapps.com/t/test-mode/12639 "2020-07-17T06:34:45Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Raph](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/raph/32/9481_2.png) [@Raph](https://community.glideapps.com/u/Raph)\ **Post date:** [July 17, 2020, 6:34am UTC](https://community.glideapps.com/t/test-mode/12639/1 "2020-07-17T06:34:45Z")
hello I need to make a lot of change in the app but while I amend it, the existing app should still be available… how to? My app has a custom domain… Thanks for your help ---
**Author:** ![ThinhDinh](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/thinhdinh/32/49_2.png) [@ThinhDinh](https://community.glideapps.com/u/ThinhDinh)\ **Post date:** [July 17, 2020, 6:45am UTC](https://community.glideapps.com/t/test-mode/12639/2 "2020-07-17T06:45:34Z")
Make a tab that looks just like the tab you want to amend, set visibility so that only you can view that tab (email is your specific email or type is Admin, something like that). Make changes on that tab and when you’re ok with all things, switch the visibility settings between the two. ---
**Author:** ![thinker\_creative](https://avatars.discourse-cdn.com/v4/letter/t/c57346/32.png) [@thinker\_creative](https://community.glideapps.com/u/thinker_creative)\ **Post date:** [July 18, 2020, 7:30am UTC](https://community.glideapps.com/t/test-mode/12639/3 "2020-07-18T07:30:58Z")
It would be cool to have a way to revert to a different version actually. ---
**Author:** ![everys](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/everys/32/10724_2.png) [@everys](https://community.glideapps.com/u/everys)\ **Post date:** [July 18, 2020, 8:10am UTC](https://community.glideapps.com/t/test-mode/12639/4 "2020-07-18T08:10:39Z")
if only Glide has the tab-duplicate function…