Hi george I asked this same question a few months back and here was Jo reply
You can do this in the application. Go to View>Tab Order, you can then change the tab order by bringing items to the front or back. If you’re using table based items though you might be able to do this using the old Action although I’m pretty sure the code just does the same thing:
Didn’t I just respond to this question in another thread? The answer, for
modern browsers, is not tables or scripts, but simply extending the input
elements with the tabindex attribute:
Input > menu Item > Extended… input Tab > button New > Name =
tabindex, Value = 1
Repeat for every input item of the form and increase the Value so each has
their unique order number.