I use Control-Shift-Tab—it’s easy to remember because it controls the way you change, or shift, the Tab key function. Use a keyboard shortcut to change the way the Tab key helps you navigate.

The Tab key is generally used as a shortcut to move from one field to another on websites, forms, documents, etc. It is also used to create different indents in the left margin in Google Docs ...

Just press Shift-Tab. And, psst, one more handy form-filling tip: You can usually hit Enter in lieu of clicking the OK or Submit button. Now you can keep your fingers on the keys where they belong!