How do I set the loading page image?

With my offline Foundry, there was an area to upload an image. This image would be shown as the backdrop as the players sign into the game. I can’t fine out where to view or set that image on Forge.

How do I set it, then view it, via Forge?

Hi.
If you use the Game Manager, then you should be able to set the banner image of the world from The Forge, that sets both the image to display in the dashboard for the game as well as the background image for the join screen. Personally, with the Game Manager enabled, I just also enable the User Manager and bypass that entirely.
Without the Forge’s Game Manager feature enabled, you would do it the same as on local Foundry, by going to the Foundry setup page and doing “Edit World” and setting it from there.
I hope that helps.

Thanks! I’ll take a look at the User Manager.

EDIT: Is that the same thing as “Configure Players” under Game Tools? /edit

…that sets both the image to display in the dashboard for the game as well as the background image for the join screen.

Is there no way to separate the two while Game Manger is active?

Yeah, under Game Tools, the Configure Players button will let you enable/disable the User Manager. More info here: The User Manager - Docs - The Forge
And no unfortunately, it’s the same image for both, you can’t separate them.