Once enabled, users will be able to tab through your input fields in the proper order. You can also enable Visual Indicators that indicate where the user is as they navigate.
I have noticed on certain computers this behavior by default results in a trouble when enabled:
Using down button to scroll down no longer works. Instead it actually tabs between different buttons and elements at times. This is especially annoying behavior on e-commerce product pages.
Do not quote me on it, but I think it has something to do with this.
Here’s Sam’s solution from the thread, which seems to work, but look at the thread because it seems some people needed to tweak it a bit: “You can set the order by right-clicking and selecting Arrange > Bring to Front in the order you want users to tab through your form.”