UPDATE 6.12.24

As of the Skyline Valley update, I *think* that this mod is no longer needed. As per the Fixes & Improvements notes, these two bullets here seems to have fixed the fly-out thing for me, which is exactly what this mod was for:

UI

• Items now display how much they will weigh when being placed in a character's stash
• Score notification will no longer remain visible on ultra-wide monitors
• Fixed an issue which would cause "You have joined a team" to remain visible on some super wide monitors
• Added Height indicators for quest targets and NPCs to the Power Armor UI
  

If this issue ever regresses, I'll fire this mod back up, but as of 6.12.24, I think our long national nightmare is over!

Fallout 76: Skyline Valley Release Notes (bethesda.net)


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ARCHIVED INFORMATION
As per the Skyline Valley update on 6.12.24, this mod is no longer needed, however I'm keeping the page up in case there's ever a regression. 
 

What's new in build .028 uploaded on 5.09.2024

• Mod updated for the hotfix that was released on 5.9.24
• I tested opening the Seasons screen along with every other game menu to ensure there were no issues
• NOTE: Scaling is larger than what it should be, but less stretched than it previously was
  
  

DISCLAIMER: I have only tested this on my rig while playing the PC Game Pass version. I have no idea if this will work for/with the Steam version (though I have heard that it does, I haven't verified myself). I debated waiting to upload this until I finally get it 100% correct but thought that it would be better to get something that's just OK (and works) out for now so as to potentially help a few folks sooner rather than later.


HOW WE GOT HERE
The ultrawide monitor support in Fallout 76 is... lacking at times. Super ultrawide support (32:9 @ 5120x1440) is even worse. The 3D game space being rendered is fine, but the UI and overlays generally aren't (some menus are stretched, others aren't, some UI elements don't go away after they appear, etc.) Of the issues, the biggest offender happens when joining a server, or when someone joins your team, or when you make progress in a challenge; you will see a slide-out/popup on screen. On 32:9 systems running at 5120x1440 these popups would slide onto the screen from the side, move back towards where they came from, but stop about halfway back and stay on the screen until you restarted the game. While I can cope with stretched menus here and there, the notification popups were a bit of a deal breaker because of how much they covered some of the trade menus. 

I had been using 32:9 mods from other folks, but as people slow down their playing, mods that I depended on would stop receiving updates (which BTW, I absolutely understand!) I decided to take matters into my own hands to see if I could, at a minimum, move these popups back offscreen after they appeared, and that minimum bar that I set was all I did. Nothing more. This simply changes some parameters of the overlay.swf file so that these popups are no longer always on screen by changing the dimensions of the overlay frame a bit. I would love to make this perfect, but I have no idea how to test the challenge popup aside from doing my eight dailies. So, I get eight attempts a day to try and get the layout to scale correctly (technically I only get 7 because the 'do 5 dailies' one pops along with the fifth one.)


HOW TO INSTALL

• Make a copy of your "SeventySix - Interface.ba2" file and store said copy somewhere you'll remember.
• Unpack the Hoverboy's Super Ultrawide HUD Fix .zip file.
• In the unpacked file there is a folder, and within that folder you'll find a file called "SeventySix - Interface.ba2"
• Copy the "SeventySix - Interface.ba2" file into your Fallout 76 data directory (in PC Game Pass it's something like: D:\Program Files\XboxGams\Fallout 76\Data)
• Answer Confirm/OK to the two prompts that will likely appear regarding overwriting the current file.
  

And that's it. To run in 5120x1440, do the following:

RUNNING FALLOUT IN 32:9

• Go to C:\Users\[USER]\Documents\My Games\Fallout 76 and open Project76Prefs.ini with Notepad.
• Go to the [Display] section and make the following changes:
       iSize H=1440
       iSize W=5120
• For the best results with 32:9 in FO76, run full screen exclusive or borderless (either works):
       bFull Screen=1
       bBorderless=0 [set this to 1 for borderless]
• Save & close.
  

HOW TO UNINSTALL

• Locate your original copy of "SeventySix - Interface.ba2" file from Step 1 in HOW TO INSTALL.
• Copy the original "SeventySix - Interface.ba2" file into your Fallout 76 data directory (in PC Game Pass it's something like: D:\Program Files\ModifiableWindowsApps\Fallout 76\Data)
• Answer Confirm/OK to the two prompts that will likely appear regarding overwriting the current file.
  
  

KNOWN ISSUES

• The popups aren't scaled correctly but are readable & usable.
• I would love to fix the scaling, but I only get eight seven attempts a day to try and get the scaling and layout right for some of the UI elements, and I actually have no idea what I am doing, so there's that. I'll keep trying as I get new leads and will upload new versions if they improve things. If you hit issues let me know.