I3-wm contains i3-dmenu-desktop, a Perl wrapper for dmenu which uses desktop entries to create a list of all installed applications. As it is an optional dependency dmenu must first be installed before this functionality can be used. I3 uses dmenu as an application launcher, which is bound by default to $mod+d. See i3 Tree and Containers and the tree data structure for details. Containers are tiled by default, but can be set to tabbed or stacking layouts, as well as made floating (such as for dialog windows). This structure branches with horizontal or vertical splits. I3 manages windows in a tree structure, with containers as building blocks. More information can be found in Keyboard shortcuts#Xorg. If switching between multiple window managers or desktop environments, consider using sxhkd or another environment agnostic program to manage bindings. Users of non-Qwerty keyboard layouts may wish to circumvent the 'configuration wizard' as described below. See Keyboard bindings to add new shortcuts. See the i3 reference card and Using i3 for the defaults. Super is the key usually represented on a keyboard as a Windows icon, or on an Apple keyboard as a Command key. This is Alt (Mod1) by default, with Super (Mod4) being a popular alternative.

In i3, commands are invoked with a modifier key, referred to as $mod. See the official documentation for more information, namely the i3 User's Guide. sktop enables logs (useful for debugging).

I3-wm includes i3.desktop as Xsession which starts the window manager. Note: i3-gaps (a fork of i3 with gaps and other features) was recently merged into i3-wm, and as such is no longer available.

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