Here is the list of pages about Fvwm configuration:
Fvwm is configured through a configuration file located at ~/.fvwm/config (default), also known as the Fvwm2rc or .fvwm2rc file. This page is an overview of the location of that file and how Fvwm starts.
The basic syntax of the configuration file.
Styles are per window settings that can be applied to all, different collections or a single window.
Colorsets are used to define colors in Fvwm. A Colorset is a collection of colors that describe different aspects of an object. This includes the foreground and background color along with the shade and highlight color (for 3D relief on borders). Colorsets can also use pixmaps and be transparent.
Fonts are used for titles, icon names, menus, modules, etc. Here is a brief description on how to configure fonts.
Fvwm can use Menus for lots of things. Menus items can run any Fvwm command or custom functions. They can even be built dynamically with scripts, such as wall paper menus, a menu that allows you to see all files in $HOME, etc. This is the basics of configuring Menus.
This describes how to configure Mouse and Key bindings.
This describes how to configure Mouse Stroke which allows you to run commands on different Mouse Stroke patterns.
Functions are a way to string a series of commands together to preform a given task. There are multiple pages about functions including: ComplexFunctions, FunctionContext, FunctionSynchronisation, FunctionTips, and StartFunction.
Conditional commands can test for existence of windows and what the current properties of windows are. This can be used to identify a collection of windows to run commands on.
Fvwm supports multiple Virtual Desktops. And more you can also split each Desktop up into an nxm grid of Pages.
Vector Buttons are a built in method for drawing buttons for windows in Fvwm. This describes the syntax and provides a collection of examples.
Modules provide additional features on top of fvwm.