kitten-panel(1)

Name
kitten-panel - Use a command line program to draw a GPU accelerated panel on your X11 desktop

Overview

You can use this kitten to draw a GPU accelerated panel on the edge of your screen or as the desktop wallpaper, that shows the output from an arbitrary terminal program.

It is useful for showing status information or notifications on your desktop using terminal programs instead of GUI toolkits. Screenshot, showing a sample panel (images not supported)

The screenshot above shows a sample panel that displays the current desktop and window title as well as miscellaneous system information such as network activity, CPU load, date/time, etc.

Added in version 0.34.0: Support for Wayland

NOTE: This kitten currently only works on X11 desktops and Wayland compositors that support the wlr layer shell protocol (which is almost all of them except the, as usual, crippled GNOME).

Using this kitten is simple, for example:

    kitty +kitten panel sh -c 'printf "\n\n\nHello, world."; sleep 5s'

This will show Hello, world. at the top edge of your screen for five seconds. Here, the terminal program we are running is sh with a script to print out Hello, world!. You can make the terminal program as complex as you like, as demonstrated in the screenshot above.

If you are on Wayland, you can, for instance run:

    kitty +kitten panel --edge=background htop

to display htop as your desktop background. Remember this works in everything but GNOME and also, in sway, you have to disable the background wallpaper as sway renders that over the panel kitten surface.

Source code for panel

The source code for this kitten is available on GitHub.

Command line interface

    kitty +kitten panel [options] program-to-run

Use a command line program to draw a GPU accelerated panel on your X11 desktop

  Options

--lines <LINES>
    The number of lines shown in the panel. Ignored for background, centered, and vertical panels. Default: 1

--columns <COLUMNS>
    The number of columns shown in the panel. Ignored for background, centered, and horizontal panels. Default: 1

--margin-top <MARGIN_TOP>
    Request a given top margin to the compositor. Only works on a Wayland compositor that supports the wlr layer shell protocol. Default: 0

--margin-left <MARGIN_LEFT>
    Request a given left margin to the compositor. Only works on a Wayland compositor that supports the wlr layer shell protocol. Default: 0

--margin-bottom <MARGIN_BOTTOM>
    Request a given bottom margin to the compositor. Only works on a Wayland compositor that supports the wlr layer shell protocol. Default: 0

--margin-right <MARGIN_RIGHT>
    Request a given right margin to the compositor. Only works on a Wayland compositor that supports the wlr layer shell protocol. Default: 0

--edge <EDGE>
    Which edge of the screen to place the panel on. Note that some window managers (such as i3) do not support placing docked windows on the left and right edges. The value background means make the panel the "desktop wallpaper". This is only supported on Wayland, not X11 and note that when using sway if you set a background in your sway config it will cover the background drawn using this kitten. Additionally, there are two Wayland only values: center and none. The value center anchors the panel to all sides and covers the entire display by default. The panel can be shrunk using the margin parameters. The value none anchors the panel to the top left corner and should be placed using the margin parameters. Default: top Choices: background, bottom, center, left, none, right, top

--layer <LAYER>
    On a Wayland compositor that supports the wlr layer shell protocol, specifies the layer on which the panel should be drawn. This parameter is ignored and set to background if --edge is set to background. Default: bottom Choices: background, bottom, overlay, top

--config <CONFIG>, -c <CONFIG>
    Path to config file to use for kitty when drawing the panel.

--override <OVERRIDE>, -o <OVERRIDE>
    Override individual kitty configuration options, can be specified multiple times. Syntax: name=value. For example: kitty +kitten panel -o font_size=20

--output-name <OUTPUT_NAME>
    On Wayland, the panel can only be displayed on a single monitor (output) at a time. This allows you to specify which output is used, by name. If not specified the compositor will choose an output automatically, typically the last output the user interacted with or the primary monitor.

--class <CLS>
    Set the class part of the WM_CLASS window property. On Wayland, it sets the app id. Default: kitty-panel

--name <NAME>
    Set the name part of the WM_CLASS property (defaults to using the value from kitty --class)

--focus-policy <FOCUS_POLICY>
    On a Wayland compositor that supports the wlr layer shell protocol, specify the focus policy for keyboard interactivity with the panel. Please refer to the wlr layer shell protocol documentation for more details. Default: not-allowed Choices: exclusive, not-allowed, on-demand

--exclusive-zone <EXCLUSIVE_ZONE>
    On a Wayland compositor that supports the wlr layer shell protocol, request a given exclusive zone for the panel. Please refer to the wlr layer shell documentation for more details on the meaning of exclusive and its value. If --edge is set to anything other than center or none, this flag will not have any effect unless the flag --override-exclusive-zone is also set. If --edge is set to background, this option has no effect. Default: -1

--override-exclusive-zone
    On a Wayland compositor that supports the wlr layer shell protocol, override the default exclusive zone. This has effect only if --edge is set to top, left, bottom or right.

--debug-rendering
    For internal debugging use.

Author
Kovid Goyal

Copyright
2025, Kovid Goyal