Hello,
As part of my user signup flow the user has to select 1 photo from 6 option.
I would like them to click a button and be presented with a popup that has the 6 options in it, like this:
The workflow I envisaged was something like this:
When user clicks on photo, set user’s cover photo to chosen photo.
But I can’t figure out how to get this to work. Any ideas? 
Hello. You need to create a field in the User data tab where his/her profile picture is stored. Then you need to create a workflow "When current cell’s Pic is clicked, make change to “Current User’s Photo”. (This works if you are storing the options in the database)
Check this example:
Thanks @grace.hallak 
Unfortunately the process I’m going for is slightly different. The popup has 6 photos to choose from.
When the user clicks on the cover photo I would like to change their cover photo to that one they’ve just selected.
But I can’t do that. There is no option to change the cover photo field when I click on any of the 6 photos
Yeah I noticed that when I was trying to do it your way. So you are using 6 image elements and each of them has a different picture. I couldn’t figure it out or maybe it is impossible. I think using a repeating group and saving the 6 pictures in the database is a good solution for now. Or you can use option sets. I have added another popup that uses option sets. Take a look:
You can put invisible shapes over each picture and then have a workflow behind each shape. When the user clicks the pic they are really clicking the shape, and the clicked shape will tell you which picture was chosen.
