this can be done in things like bspwm and i3 ans that type of tiling wm , but as someone else’s said it’s a property of your wm not the app 

On Fri, 24 Mar 2023 at 10:25, lacsaP Patatetom <patatetom@gmail.com> wrote:
Le ven. 24 mars 2023 à 11:13, <2QdxY4RzWzUUiLuE@potatochowder.com> a écrit :
>
> On 2023-03-24 at 11:03:33 +0100,
> lacsaP Patatetom <patatetom@gmail.com> wrote:
>
> > I would like the `lxtask` application (LXDE task manager) to open
> > systematically in "always on top" mode : is it possible to do this in
> > the `~/.Xresources` file ?
> > otherwise, where can it be configured ?
>
> "Always on top" is a function of your window manager, so the answer to
> your question depends on your window manager.

I'm using OpenBox.
I will take a look at his documentation.
I am interested if you have the solution in hand or under elbow ;-)

thanks for the track, regards, lacsaP