How to add custom shortcuts to Maya shelves?

I found this quick tip while I was watching a lecture from my Animation Mentor‘s mentorship.

Let’s say you want to add a shortcut for the Content Browser in one of the Maya shelves. Here’s what you need to do:

1. Select the desired shelf, for instance Custom.
2. Find the item you want to add the shortcut to the shelf, in our case Windows > Content Browser.
3. Hold SHIFT + CONTROL (or SHIFT + COMMAND on macOS) and left click.
4. The icon for that item should appear on the shelf you selected.

And that’s it, simple and useful.