The Motif Style Guide defines a model for mouse
button operations. By following this model, your widget's behavior will
be consistent with other Motif widgets. A brief description of the bindings
for a 3-button mouse appears in Table 7-2:
| Physical Key | Virtual Buttons | Purpose |
| Button1 | Select | Selects and activates |
| Button2 | Transfer | Transfers data, including primary paste and drag operations |
| Button3 | Menu | Activates Popup Menus |
For a more detailed description of mouse button bindings, see the Motif Style Guide. Note that, unlike virtuals keysyms, virtual button bindings may not be used in translation tables.