Your Groups and Categories for income, expense, and transfers can be ordered in the way that makes the most sense to you. This makes your Plan (or Budget) page truly yours!
To do this, head to your Categories page. Then:
On web, long-click on any Group then drag and drop to reorder them however you like!
On mobile, click on Menu in the lower right, then Settings, then Categories. From Categories, select the type of Group (Income, Expenses, Transfers) from the toggle towards the top.
Now, long click a Group. You'll be taken to a new screen where you can drag and drop the Groups however you like!
That was a lot of words. Here's a gif!
Please note: You cannot change the order of the headers named Income, Expenses, or Transfers.