I tried this change but the top bar is still visible for me. I tested with the simplest form using this command:
tdrop -q kitty --start-as fullscreen

The below command didn't work either:
tdrop -amAq -w 100% -h 100% kitty --start-as fullscreen

@mr2rm Which window manager are you using? It might not support removing the title bar of an existing window.

Could you test using these commands?

xprop -format _MOTIF_WM_HINTS 32c -set _MOTIF_WM_HINTS "2, 0, 0, 0, 0"
xprop -format _MOTIF_WM_HINTS 32c -set _MOTIF_WM_HINTS "2, 0, 2, 0, 0"

After executing click on a Kitty window.

@lennartack I tried that in Ubuntu and I use the default window manager of Ubuntu, the Gnome Shell. Also, I tested the two commands you sent but didn't get any output.

@mr2rm These xprop commands should remove the title bar. From Googling it appears that Gnome Shell doesn't support this method. People are using Gnome extensions to remove the title bar. If you can figure out a way to remove the title bar with a Bash command I can include it in the PR.

@mr2rm I see others are using a hexadecimal notation for the values with xprop. Could you try if the following works?

xprop -format _MOTIF_WM_HINTS 32c -set _MOTIF_WM_HINTS "0x2, 0x0, 0x0, 0x0, 0x0"

@lennartack Any of the commands you mentioned don't work. Apparently, Gnome Shell doesn't support that. I had to use the below extension to get the job done. I couldn't find any other solution.

https://extensions.gnome.org/extension/1287/unite/

This should all be possible without new flags (or if a new hook is necessary, I'd accept a PR for that). I'd accept a PR to add an example to the FAQ in the readme about sticky, but I'd rather not directly add this to tdrop. Better to just use whatever will work work for one's specific WM in a hook I think (wmctrl is also not currently a dependency of tdrop). Let me know if there's anything that would need to be changed directly in tdrop to support this.

@noctuid The title bar removal would require a new hook. It needs to execute before the window dimensions and location are changed by tdrop but after the window id is known.

That said, having these flags would make it much less painful to switch to tdrop on floating window managers. Guake and Yakuake work out of the box on many WMs, so it might be worth checking out how they do it and if there is a Bash equivalent. Even if you need different code for different WMs I think it's still worth it.

I did some more research about the title bar removal. Guake also seems to use _MOTIF_WM_HINTS and I think this works on (almost) all window managers. However, it appears that changing _MOTIF_WM_HINTS via xprop doesn't always work because it does not use the right data type (of the underlying C struct). I suspect that's also why @mr2rm was not able to get it to work. This C program probably does work: https://gist.github.com/muktupavels/d03bb14ea6042b779df89b4c87df975d. I tested on XFCE, where the C program works but the xprop command does not.

I guess adding C code is outside the scope of this project, so we can't have this option on many WMs. I think we need a tdrop in another language...