Can I move Steam notification popups?

Solution 1:

You can select the default position of the popup by editing the file resource/styles/gameoverlay.styles in the Steam directory and searching for the Notifications.PanelPosition variable. Possible values are BottomRight, BottomLeft, TopRight and TopLeft.

Note though that the default position can be overridden by the game. In which case, unless the developers have included an option to configure it, you're at a loss.

Solution 2:

You can change it for your system but not currently for specific games.

You need to find the SteamScheme.res file in the resource folder (within your main Steam folder) and search for "Notifications.PanelPosition" (I think that's correct - if not, search for "Notification" and I'm sure you'll find it). It's defaulted to "BottomRight", you can change it to "TopRight" and so on. Don't think you can make it any more specific than that, though.