FVWM is an ICCCM-compliant multiple virtual desktop window manager for the X Window system. It is configured by editing text-based configuration files. Although using FVWM does not require any knowledge of programming languages, it is possible to extend FVWM with M4, C, and Perl preprocessing. FVWM also has a Perl library which allows one to create modules - separate programs that are spawned by FVWM and provide extra functionality. FVWM stands for F Virtual Window Manager. The official stance is that the F does not stand for anything in particular .
- 1 Installing
- 2 Starting
- 3 Configuration
- 4 Tips and tricks
- 5 See also
Install the package . For a desktop environment like experience with FVWM at its core, install .
Select FVWM from the session menu in a display manager of choice. Otherwise, add
exec fvwm to your user's
For FVWM Crystal, select FVWM-Crystal from the session menu or add
exec fvwm-crystal to your user's
See xinitrc for details, such as preserving the logind session.
FVWM provides a number of functions to start modules or applications when initialising, restarting or exiting the window manager.
- StartFunction - executed when FVWM is first initialised and on restarts.
- InitFunction - executed only when FVWM is first initialised.
- RestartFunction - executed only when FVWM is restarted.
- ExitFunction - executed when exiting FVWM.
You can add your own actions to any of these functions using the
AddToFunc command. For example, if one wanted to start network-manager-applet on startup (but not for any subsequent restarts of the window manager) one could add the nm-applet command to the InitFunction:
AddToFunc InitFunction + I Exec nm-applet &
You can also use just StartFunction and prepend your commands with Test commands which check whether the window manager has started or restarted and run the action only if the test is true. Using this method, nm-applet could be started in the following manner:
AddToFunc StartFunction + I Test (Init) nm-applet &
The following configuration file locations are supported:
The following configuration locations are supported as of version 2.6.6, but may not be supported in the future:
FVWM will no longer ship sample configuration files as of version 2.6.7. Nonetheless, the removed sample files can still be viewed on GitHub. The fvwm-themes project also provides ready-made configurations.
The virtual desktop
For its virtual desktop, FVWM implements both workspaces (used by window managers such as Metacity and Openbox) and viewports (used by window managers such as Compiz). See  for a description of the differences between workspaces and viewports. FVWM refers to workspaces as desks and viewports as pages.
Pages in FVWM are arranged in a grid. The number of pages used can be defined with the
DesktopSize command. For instance, adding
DesktopSize 3x3 to your configuration file will give you 9 pages, arranged in a 3x3 grid. Pages can be navigated using the pager module or with the
MoveToPage command which could be mapped to a keyboard shortcut or menu entry. For instance, the command
MoveToPage -1p +0p will move the viewport 1 page to the left of the current page.
The number of desks available in FVWM is very large, the minimum desk number is -2147483648 and the maximum is 2147483647. By default, FVWM starts on desk 0. Desks can be navigated using the pager module (if it is configured to show a number of desks) or with the
MoveToDesk command -
MoveToDesk +1 will move to the next desk, relative to the currently used desk.
Keyboard and mouse bindings
Keyboard or bindings can be defined in the configuration file with the
Mouse command. The syntax of the command takes the following form:
Key/Mouse (window) button/key name context modifiers action. For instance, the following example will launch an XTerm on an
Key F2 A 1 Exec xterm. Note that the
(window) argument is optional.
The context value defines where the binding will be applied. The following contexts are valid: R (root window), W (application window), D (desktop manager window - PCManFM desktop manager for instance), T (title bar), S (window side, top, bottom), [ ] - _ (left side, right side, top, bottom respectively), F (window frame corners), < > ^ v (left, right, top, bottom corners respectively), I (icon window), 0-9 (titlebar buttons) and A (all contexts). Any combination of these letters is also acceptable.
The modifier value can be one of the following: A (any), C (control), S (shift), M (meta), N (none), or 1-5, representing the X Modifiers - run
xmodmap to see which X modifier is which. Multiple modifiers should not be spaced. For instance, to use the modifier
Control+Alt, you would supply as the modifier argument
The action must be an FVWM function to run, such as the Quit function or Menu function. Execution of external commands, such as xterm, can be achieved with the Exec function, as shown above.
FVWM can provide up to 10 window buttons. These are numbered 0-9. Even numbers indicate buttons located on the right hand side of the titlebar whilst odd numbers indicate buttons located on the left. The layout is as follows:
1 3 5 7 9 0 8 6 4 2
Window buttons will remain hidden unless a
Mouse command is used which specifies one of the titlebar buttons as the context. For instance, to activate the rightmost titlebar button and make it close the window on a left click, one would use the following command:
Mouse 1 2 A Close
Mouse is the name of the command, 1 is the mouse button, 2 is the number of the rightmost titlebar button, A is the modifier (any) and Close is the action to be taken. See #Keyboard and mouse bindings for more information.
The style of your titlebar buttons can be configured with the
ButtonStyle command. This takes the following syntax:
ButtonStyle button-number state style -- flag
The state can be one of ActiveUp, ActiveDown, InactiveUp, InactiveDown. ActiveUp and ActiveDown refer to the un-pressed and pressed button states of the active window. Likewise for the Inactive states. One can also use just Active or Inactive which are shortcuts for both the pressed and un-pressed button states.
The style argument can be one of the following:
- Simple - does nothing.
- Default - takes argument of button number for default style to load.
- Solid - fill button a solid color.
- ColorSet - fill button with the ColorSet specified - takes an alpha argument between 0 and 100.
- Vector - draws a line pattern - using the keyword Vector is optional as this is a standard style.
- ?Gradient - fills the button with a gradient - see the FVWM man page Color Gradients section for the syntax.
- Pixmap - fills the button with a given pixmap - see also the following variants: AdjustedPixmap, ShrunkPixmap, StretchedPixmap, TiledPixmap.
- MiniIcon - fills the button with the window's mini icon.
The flag affects the state for a button. Some examples of flags include Raised, Sunk and Flat. For more information, see
man fvwm and look for the ButtonStyle section.
Title and border styles
The window titles and borders can be configured with the
BorderStyle commands respectively.
TitleStyle can take the following arguments:
TitleStyle justify Height height-in-pixels
The justify argument can be LeftJustified, RightJustified or Centered. TitleStyle and BorderStyle can take the following arguments:
TitleStyle/BorderStyle state style -- flag
See #Button styles for the state, style and flag arguments.
Menus can be created with the
AddToMenu command. This takes the following syntax:
AddToMenu menu-name menu-title Title
Remove the menu-title and Title arguments to create a menu with no title. Subsequent entries in the menu take the following syntax:
+ entry-name action
See the following example:
AddToMenu "Web" "Web Browsers" Title + "Firefox" Exec firefox + "Chromium Exec chromium + "Opera" Exec opera
Popup command to show other menus. For instance, to include the menu defined above in another menu one could use the following syntax:
+ "Web Browsers" Popup "Web"
FVWM menus also support icons. To give a menu entry an icon, provide the path to the icon enclosed in
% signs after the entry name - see below:
+ "Chromium %/usr/share/icons/hicolor/16x16/apps/chromium.png%" Exec chromium
Use the xdg_menu tool, provided by Xdg-menu#Fvwm2., to automatically generate menus - see
Style command allows one to configure various aspects of the window manager itself and also to set behaviors for certain windows. The syntax is
Style window-name stylename. The window-name argument can be a window name, class, title name or resource string. Use
* to match all windows. See
man fvwm for all available styles - some examples are provided below:
Style "*" CascadePlacement- make the window manager use the cascade placement algorithm for all new windows.
Style "Chromium" PositionPlacement center- ensure that all new Chromium windows are placed in the center of the screen.
Style "xterm" StartIconic- ensure that all new XTerm windows start iconified.
Style "*" HilightBack indianred- set the frame background of any focused window to the color indianred.
FVWM provides many built in functions, examples being
Close to close a window or
Exec which allows the execution of an external command. Users can also define their own functions or add to existing functions using the
AddToFunc command. This uses the following syntax:
AddToFunc function-name I|M|C|H|D action.
The letter codes stand for the following: I - execute immediately, M - execute when the user moves the mouse, C - execute on mouse click, H - execute when the user holds the mouse button, D - execute when the user double clicks the mouse button. Below is a trivial example of a function:
AddToFunc VolumeFunc + I Exec xterm -e alsamixer
One can also use conditional commands (see
man fvwm and look for the Conditional Commands section). For instance, suppose one wanted a function that would close all windows in the current page other than the one which has focus. That function can be defined as below:
AddToFunc CloseAllButThis + I All (CurrentPage, !Focused) Close
All conditional matches all windows that meet the conditions defined in parenthesis.
Functions can execute more than one action, just add one line for each action beginning with a plus sign:
AddToFunc MyFunc + I action1 + D action2 + I action3
Modules are separate programs, spawned by FVWM that can add extra functionality. Modules can be spawned using the following syntax:
Module ModuleName (identifier) ModuleArgs.
Sometimes, one might want to spawn multiple instances of the same type of module, each with their own separate configuration. In this case, one should spawn the module with an identifier, for instance:
AddToFunc StartFunction + I Module FvwmButtons Panel1 + I Module FvwmButtons Panel2
where Panel1 and Panel2 are the identifiers.
Most modules will have a number of module commands which can be used to configure the module's appearance or behavior. Use the following syntax:
*ModuleName/Identifier: module-command command-args
For instance, if one spawned an FvwmPager with the identifier MyPager then one could configure it in the following fashion:
*MyPager: Geometry 135x90+0+0 *MyPager: Back midnightblue
The FvwmPager is a module which provides a visual representation of the desks and pages provided by the window manager. Like all modules, it must be spawned by FVWM. To start an FvwmPager, add something similar to the following to your StartFunction:
+ I Module FvwmPager
With no arguments, the FvwmPager will only display the viewports for desk 0. With the arguments 0 9, FvwmPager will show the 10 desks from 0-9.
+ I Module FvwmPager 0 9
With the argument * the FvwmPager will show only one desk but it will always be the desk that is currently being used.
+ I Module FvwmPager *
man fvwmpager for a list of module commands.
FvwmButtons is a module which can create a box of buttons which can perform actions when pressed. FvwmButtons can also "swallow" application windows. This might be useful for swallowing a system tray window or a clock window. The size of the panel is automatically determined (the panel will resize to accommodate all elements) however it is also possible to manually set a size using the
Geometry command. This takes a standard X geometry. The basic commands needed to create an FvwmButtons panel are outlined below.
Set the number of rows and columns:
*FvwmButtons: Rows x *FvwmButtons: Columns x
Create a button (this example creates a button with a title and an icon which launches an XTerm when left clicked):
*FvwmButtons: (Title "Xterm", Icon /usr/share/pixmaps/mini.xterm_48x48.xpm, Action (Mouse1) Exec xterm)
You can omit any of these arguments if you so choose.
Swallow a window (this example swallows a stalonetray):
*FvwmButtons: (Swallow(UseOld, NoClose) "stalonetray" "Nop")
The Swallow command takes a number of "hangon" arguments. Here, the UseOld and NoClose arguments have been used. UseOld means that an existing window will be swallowed if it exists. NoClose means that the window will not be closed if the FvwmButtons process is terminated. The stalonetray argument is the class of the window that we want to swallow. Replace as appropriate. The last argument is a command to start the application that is to be swallowed. In this example, it is assumed that the application has already been started so the argument provided is Nop which is a function that does nothing. One could replace this with
"Exec stalonetray" to start the application from the FvwmButtons module instead of assuming that the application has been started elsewhere.
Containers are spaces defined which can span multiple rows and columns or subdivide a row or column into more rows or columns. This can be useful for instance if one wants to allocate a certain percentage of space to an element. Say one wants to swallow an XClock and allocate 100% of the width and 80% of the height to the XClock. This can be defined as such:
*FvwmButtons: Rows 5 *FvwmButtons: Columns 1 *FvwmButtons: (1x4, Container) *FvwmButtons: (Swallow(UseOld, NoClose) "xclock" "Nop") *FvwmButtons: (End)
Note that a container is created by defining a certain number of columns and rows and then using the keyword container. Elements inside the container are defined underneath this line and the container is then closed with the End command.
For a full list of options, see
FVWM color styles can take a number of color code types such as hexcolors (
#ffffff for instance), rbg colors (
rgb:ff/ff/ff for instance) as well as the pre-defined X11 colors.
The following styles might be useful:
Color- this takes two arguments, the color of the unfocused window title text and the color of the unfocused window frame separated by a forward slash, black/lightgrey for example.
HilightBack- takes a single argument, the color of the focused window frame.
HilightFore- takes a single argument, the color of the focused window title text.
Colorsets in FVWM are a set of four colors (a foreground color, a background color, a shadow color and a highlight color) as well as an optional background pixmap. Any part of FVWM that uses a particular colorset will be affected if that colorset is changed.
All colorsets are identified by a number. The first 40 colorsets, 0-39, are reserved. Those colorsets are documented on sourceforge.
Colorsets can be created with the
ColorSet command - syntax:
ColorSet number options. See
man fvwm - the Colorsets section - for more information.
For styles such as
Font, use to determine the correct font names for X11 fonts - see X Logical Font Description and Font configuration for more information. You can also specify xft fonts, for example:
Windows in FVWM can be iconified (minimized). This means that the window will disappear from view and be replaced by an icon on the desktop, similar to the behavior in Microsoft Windows 3.1.
The program itself will supply the icon. One can also set a default icon to be used, in case a program does not have an icon to supply:
Style "*" Icon /path/to/default/icon.png.
To disable icons altogether, use the following style:
Style "*" NoIcons. This means that the window will simply disappear when iconified.
The positioning of icons can be controlled using the
IconBox style - note that this is not the same thing as the FvwmIconBox module - along with the
IconFill style. Use
Style "*" IconBox none to disable the IconBox. This means that icons will be placed at the position of the top left corner of the window. Else, use
Style "*" IconBox l t r b where l t r b stand for left, top, right and bottom respectively. These arguments should be the number of pixels away from the screen edge that the IconBox edge should be. Hence, arguments of
+0 +0 -0 -0 means that the IconBox will fill the entire screen.
Multiple IconBox styles can be defined but they must be defined on the same line, for instance:
Style "*" IconBox +0 +800 -100 -0, IconBox -200 +0 -0 -120
When the first IconBox overflows, icons will then be placed in the second IconBox. Note that if the last IconBox overflows then the default IconBox will be used which covers the entire screen and fills from top to bottom - left to right.
IconFill style to control how icons will be filled. A style of
Style "*" IconFill left bottom means that icons will be filled from left to right - bottom to top (Motif Window Manager behavior). A style of
Style "*" IconFill top left means that icons will be filled from top to bottom - left to right. Note that the IconFill style should be defined on the same line as the IconBox style, for instance:
Style "*" IconBox +0 +0 -0 -0, IconFill left bottom
Tips and tricks
MWM compatibility options
FVWM provides a number of options that allow it to mimic the appearance and behaviour of MWM (Motif Window Manager).
Emulate Mwm- this commands places the geometry feedback window in the center of the screen.
MenuStyle Mwm- this command gives menus the appearance of Motif menus.
MwmButtons- this style makes the maximize button look pressed in when a window is maximized.
MwmBorder- this style makes the window border bevel more closely match the style of Mwm window borders
MwmDecor- this style makes FVWM attempt to honor MWM hints that some applications might set.
MwmFunctions- this style make FVWM attempt to recognize and respect functions that MWM would prohibit.
HintOverride- this style is similar to MwmFunctions but instead it shades out the prohibited functions but allows the user to perform them anyway.
Force icon size and background
The sizing of icons is not regular as different programs provide icons of differing sizes. Use the
IconSize style to force a regular size:
Style "*" IconSize 48 48 Note that icons larger than the given size will be clipped.
By default, icons also have no background. You can use the
IconBackgroundColorset style to force icons to have a background. See #Colorsets.
Ignore resize hints
Some applications, such as XTerm, supply a maximum size to the window manager that might be smaller than the screen size. This means that if such an application is maximized, it will not cover the whole screen. To force FVWM to ignore these hints, use the following:
Style "*" ResizeHintOverride.
Do not use a wireframe when moving or resizing windows
OpaqueMoveSize unlimited command to view the window itself when moving.
Style "*" ResizeOpaque to view the window itself when resizing.
Disable edge scrolling
To disable scrolling to the next viewport when moving the mouse pointer to the screen edge, use the following command:
EdgeScroll 0 0.
Stop modifiers from interfering with mouse and key bindings
NumLock, CapsLock and ScrollLock can intefere with ClickToFocus as well as mouse and key bindings. To disable this behavior, use the following command:
Style "*" ClickToFocus. See
man fvwm for other focus behaviors.
The following functions can tile a window to the left half, right half, top half or bottom half of the screen respectively when called and return the window to its original position when called again.
AddToFunc TileLeft + I ThisWindow (!Shaded, !Iconic) Maximize 50 100 + I ThisWindow (Maximized, !Shaded, !Iconic) Move +0 +0 AddToFunc TileRight + I ThisWindow (!Shaded, !Iconic) Maximize 50 100 + I ThisWindow (Maximized, !Shaded, !Iconic) Move -0 +0 AddToFunc TileTop + I ThisWindow (!Shaded, !Iconic) Maximize 100 50 + I ThisWindow (Maximized, !Shaded, !Iconic) Move +0 +0 AddToFunc TileBottom + I ThisWindow (!Shaded, !Iconic) Maximize 100 50 + I ThisWindow (Maximized, !Shaded, !Iconic) Move +0 -0