Word for Mac: how to increase/decrease font size with (laptop) keyboard?

Microsoft Word for Mac 2019 now has built-in shortcuts for this:

⌘ Command+] increases the font size by one step

⌘ Command+[ decreases the font size by one step

OK, I've found the answer. You can assign keyboard shortcuts to any Word 2011 command. Go to Tools, then Customize Keyboard. Choose Format category. Find GrowFont and assign a keyboard shortcut to it. Find ShrinkFont and assign a keyboard shortcut to it.

I assigned CMD+SHIFT+Arrow keys (up to grow, down to shrink).

They make no conflicts to me, and they are Word only.

These two single keyboard shortcuts make worlds of difference when editing docs.