I have found out that the default tab order for a finished interactive PDF is the order in which the controls were added to the document. I would like to change that tab order, as it is a little ludicrous to have to plan out every control's addition in order for the end user to be able to tab through the document controls in a logical sequence. If that is not an option available in the package, I think that it would be a very useful feature to add in the next update of the product. I really am somewhat amazed that there doesn't seem to be a way to do it in such a sophisticated product now. Makes me think that I am just missing how to do it, but searching for "tab order" doesn't reveal a thing about setting it.