In Xcode 11, what are the keyboard shortcuts to open/change file in assistant editor?

Question

Seems like we can use ^⇧⌘↩︎ to focus/unfocus current editor, though even when the current editor gets unfocused, I'm not sure how to control what gets opened in the assistant editor.

I would like to know the keyboard shortcuts for:

1. Open a specified file in assistant editor.
2. After assistant editor is opened, change which file gets displayed in assistant editor.

Thank you!

Answer 1

Note: ⌘^⇧↩︎ switches between double and single editor mode.

To open assistant editor:

Use ⌘ + ^ + ⇧ + ↩︎ to switch to double editor mode

After using ⌘ + ⇧ + o to select a file, use

1. ↩︎ to open in current focused editor OR
2. Option + ↩︎ to open in assistant editor

(use ⌘ + J and then ← → to switch editor focus)

To close assistant editor:

⌘ + ^ + ⇧ + ↩︎ to switch back to single editor mode

Answer 2

Pro Tip: You can always see the list of all available shortcuts on: -

Xcode -> Preferences -> Key Bindings

Then search the shortcut you want via the search bar.

Try to learn/muscle memorize new shortcuts on need to use basis ie if you find yourself performing certain action repetitively then maybe it's time for having a shortcut for that then visit the shortcut list or even make your custom shortcuts for that tasks.