How can I set up tab to go back and forth between legacy fields and content control fields in a Word

[Ikajed]

How can I set up tab to go back and forth between legacy fields and content control fields in a Word Form? Currently, as soon as I tab to a content control field it then will just tab to the other content control fields and skip over the Legacy fields. I have drop down lists that I have to use content controls for because the Legacy drop down list has a limit of 25 and my lists exceed that number. Also, I need a calendar pick date which is only available in content controls. If I switch my text fields (such as social security numbers) to content control text fields, I do not have the option to limit the field to numbers, as well as a specific amount of numbers. This happens when protected by filling in forms as well as using F11 when protected by no change and marking fields for everyone.