This is not a feature that is supported in DataAssist or any of our other tools and would require a custom solution. From what you have described you would need to have some recordsets on the page and use some js to switch out the display based on the user selection. The idea is similar to what Dynamic Dropdowns does, but takes it quite a bit further. If you have Dynamic Dropdowns you might be able to look at the code there to get an idea for how this type of thing can be done.