I broke my viewport navigation. CTRL+MMB and SHIFT+MMB don't work anymore?

Support Basics & Interface
1

Hmm… I somehow managed to break my viewport navigation.

MMB drag still rotates around in the viewport but CTRL+MMB and SHIFT+MMB don’t translate and dolly in/out anymore.

Any idea what I did and how to revert it?

2

Did you try reloading the blend file?

3

There’s 2 main approaches depending on the extent your Blender was customized.

If you don’t mind loosing your customization, reset Blender. There’s 2 ways.

  1. When you load Blender: File > Load Factory Settings
    (Note, this will not completely revert/reset ALL of your settings)

  2. Manually Delete (or Rename) the Blender Settings Folder. Depending on the OS it is located in different spots, on Win you can find it here:
    C:\Users\ … your user name … \AppData\Roaming\Blender Foundation\Blender
    Once that folder is deleted/renamed, the settings will be recreated to default on next boot. This is a full reset.

If you have a moderately customized Blender where reseting is not an option, you can manually hunt down the issues. Although it’s a bit too much for me to write if it’s not necessary. I had explained it previously to some other users so you could possibly search for those posts.

4

Have you removed lock to object?