This entire post applies to anyone using Windows. Even TWBT and mod packs.
I pray this feature is added to the steam version. It's kinda expected in steam games of today.
The entire goal of using borderless fullscreen is so you can use a second monitor, ie: the wiki or a video, and have the game screen up simultaneously. This is perfect for following guides as you can move you mouse cursor over the 2nd monitor, scroll down the guide, then move the cursor back to the game, all without having the game losing focus. If that sounds far fetched, then try it.
If you're having issues with Borderless Gaming (BG). I found it also requires editing init.txt. Here's a functional init.txt and BG window
To prevent any odd resizing issues with BG
[INTRO:NO]
[WINDOWED:YES]
[WINDOWEDX:1920]
[WINDOWEDY:1080]
[FONT:Kyzsmooth.png]
[GRAPHICS:NO]
If you're having issues with this program, Borderless Gaming (BG). You'll see it flicker a couple times and try to remove the border but fail over and over. To fix.
[RESIZABLE:NO]
[BLACK_SPACE:YES]
[TRUETYPE:NO]
Will put the window over your taskbar when it's borderless fullscreen.
[TOPMOST:YES]
I'm using a 1080p monitor. Above. TOPMOST:YES will put the game over the windows taskbar. You can also play with the Always on top setting in BG, but the setting in init.txt seems more "correct". The Window Size, you can give a X,Y for the game and W,H of the window size. One bug I found, or maybe feature, that X,Y is the distance from your primary monitor, and the "Select Favorite Screen" option doesn't work for me.
Seem to be able to use
ANY FONT now. I credit it to using the RESIZABLE:NO option.
Seen a streamer today have the same issue, they play with a resized UI after using the scroll awheel. When I tested 16x, half of one tile would always go 'outside' of the screen up top and to the right. The IDLE: or Depth Meter show half-way off of the screen. Plus the resizing the UI this way, has to be done every time starting the game or if you accidentally hit the scroll wheel. Best is to find a font the size you need, hit F10 to reset the zoom, and never zoom the UI again, that at least guarantees you'll see the same-sized interface each time booting up the game.
Regarding my settings, I'm using Kyzsmooth above, a 16x24 font. That's 720p resolution, but it looks beautiful in my game. It took time to get used to it, but the cool serif's give it something unique to look at. Look at the G in God of Blood below. (I hit F10 right before capturing):