I have a sheet with a webform. The sheet has the column to attach files. When I go to the webform builder/editor I do not see this field. I also can't find how to create a field that is an attachment column in the sheet. I saw in the demo vidoe of webforms it is possible to add an upload button to the webform, but in the tutorial when they click add field the Upload file is already listed as a field from the sheet. It doesn't explain to me how to get this field to be availabe tothe web from. Any ideas?