Open the appropriate file for editing:
Personal: HomeDirectory/.dt/dtwmrc
System-wide: /etc/dt/config/language/sys.dtwmrc
For information on creating these files, see Workspace Manager Configuration Files.
Create the new button binding set. See Button Binding Syntax.
Set the buttonBindings resource to the new name:
Dtwm*buttonBindings: ButtonBindingsSetName
Choose Restart Workspace Manager from the Workspace menu.
The new button bindings replace your existing button bindings. Copy any button bindings you want to keep from DtButtonBindings.