How to select the "main" photo for a stack?

[rgilton]

When one has a stack of images, how do you select the "main" image to use to represent the stack?

In the web interface, if I have the stack open, then I can click on the thumbnails of each photo. When I click on one of the thumbnails, a white dot appears beneath it. This looks like it is maybe supposed to select the main image, but the selection does not persist when I exit viewing the stack.

[NicholasFlamy]

As far as I can tell, the White dot simply shows the currently selected image. I don't see any way to change the main image. I'll make this a feature request.

[jrasm91]

There is an update stack API call which supports changing the "primary" asset in a stack, but it doesn't look like there is a way to do that action on the web interface yet. Should be easy to add though.