I watched this form being used in action, and it's very unclear that you don't need to pick the drop-down if you're uploading the file (and if you, it will be ignored).
There are two options here, and they are exclusive to each other:
use in-built defaults
upload your own customised file
So add some styling to present this as tabs (it's probably feasible to do this with CSS only using a "hidden" checkbox).
I watched this form being used in action, and it's very unclear that you don't need to pick the drop-down if you're uploading the file (and if you, it will be ignored).
There are two options here, and they are exclusive to each other:
So add some styling to present this as tabs (it's probably feasible to do this with CSS only using a "hidden" checkbox).