So, sometimes I have to work with multiple Blender instances. But it always opens in 1920x1080 resolution, despite using a single 6k monitor (ultra wide).
Is there a way to have Blender open in the resolution I already saved it with? It can get annoying when I need to keep resizing many windows at the same time.
I never had Blender open in a definition different from my monitor. Is this a regular thing for you ? If it’s acting up, I think I would consider it a bug
Well, it is regular ever since I switched from 2 1080p monitors to a single 6k one. It does this for 4.2 and 4.3
You can maximize the size of the window in the Run Program shortcut settings. (Windows Users)
For specific Windows Options see also Docs-Blender Manual: → command line → arguments command-line arguments window-options …
-p or --window-geometry <sx> <sy> <w> <h>
Open with lower left corner at <sx>, <sy> and width and height as <w>, <h>.
Weirdly enough, Maximizing window with “Maximized” selection for shortcut didn’t work. But addin " -M" argument into Target row worked.
…but doesn’t work for opening Blender with specific “.blend” files.
Hmm… 
i think that blender also stores the windowsizes… because when opening multilpe blender windows then they are restored. There seems to to be no disable Load UI option via commandline like for the open file dialog.
Maybe with some other helper tools to run an app and then control the window size ( like for linux the xdotool…).
ATM cannot test a wide monitor, but IIRC, the window size is stored in the startup file (not in normal blend files)…
You could try it to see if works. (open Blender, maximize, save startup file, close, test)
Yep, this worked. Thanks!