One of the great things about Xcode is that you can add custom keyboard shortcuts for just about any command. Two favorites enable me to toggle playground markup on and off and to run a playground on demand.
Adding shortcuts lets me run these common tasks without lifting my hands from the keyboard and selecting items from a menu. It’s a big time saver.
You establish shortcuts using Xcode > Preferences > Key Bindings. Search for the command-name using the field at the top-right, then double click in the key field and type the key (or key-chord) you want to use.
Click away from the field after entering your selection. Don’t press return or Xcode interprets that as your requested key entry.
A red exclamation point indicates binding conflicts:
Click the red icon to jump to the Conflicts tab, which lists all keybinding issues:
Red conflicts indicate unresolvable overlaps. Yellow conflicts mean that keyboard shortcuts established in System Preferences may override the built-in bindings.
Activate the edit field by double clicking. Either replace the key binding or click the small gray circle with a minus at the right to remove the assigned key. Once resolved, conflict items leave the list.
The Customized tab list all user-adjusted key bindings. This tab enables you to review your changes in one place.
This screenshot shows both the custom F8 binding for “Execute Playground” and the customization for “Step Out” on the debug menu, which normally uses F8. I removed that to resolve the overlap, preferring F8 for playgrounds.
To revert changes, select one or more items you’ve customized and click Delete. If you want to try this out, it’s safe. Deleting key binding customizations uses Xcode’s undo stack. You can undo your reversion to recover any customization you may have accidentally removed.
I wrote a blog post on editing keyboard shortcuts via scripts, which makes it easy to set up a new machine. I don’t think it would work for Xcode, because I believe it keeps its keyboard shortcuts in ~/Library/Developer/Xcode/UserData/KeyBindings, but you can sync that file through Dropbox via a symlink, so maybe it’s not as important. Here’s the blog post, as you or your readers may find it interesting: https://www.raizlabs.com/dev/2015/02/how-to-script-os-x-keyboard-shortcuts/