In the config file at
you will find lines that define
- which tray application will be started at boot
- which applications will float or will be tiled
- which application you want to start automatically
You can always read more on the i3 documentation site.
Example of a floating application (<=> tiling)
Gnome-disks is a floating application. xprop is the application to figure out the naming of the window.
Contents of movie
- find the lines in the config file
- overview of the possibilities
- why numlockx
- difference of floating windows and tiled windows explained
- MOD key and move a floating window out of the way with your mouse
- vlc has a preference popup – checking the name
- what tray application will be started
- what application will be started at boot
- I made personal shortcut keys to start the most important applications
WM_CLASS(STRING) = "gnome-system-monitor", "Gnome-system-monitor"
First part after wm_class(string) is the instance and second part is the class.
So depending on what you want to achieve you can use or class or instance.
for_window [instance="variety"] floating enable
for_window [class="Gnome-system-monitor"] floating enable