Here's the lead form below
How to use:
- Upload the file you want to be downloadable in to page attachements
- Put it to any place on the page, save the page and open it as a webpage on the site - copy the file link. (you need to remove it later, this step just to get the link)
- Edit the last "Viewport Form Input" macro with name=hidden-file and paste that link to the "Default Value" field, and change the "Label" field there (will be shown as a text for the link)
- Now you can remove the file from the page and put some Preview image if you need.
- Do not remove this section! Just remove the text or change it