Editing Mouse button (section)

==Acorn RISC OS==
The [[Acorn Archimedes]] mouse had three buttons. These buttons were named Select, Menu, and Adjust<ref>Telcontar.net – [http://telcontar.net/Misc/GUI/RISCOS/ The RISC OS GUI]</ref>, and functioned as follows:

;Select
:The Select button behaves the same as button 1 on any other system.
;Menu
:The centre button display a menu at the mouse cursor position. [[RISC OS]] has no menu bars, and the application menu structure appears as a context menu would on other system. If the menu was opened against an object on the screen (text selection, file icon etc) then one of the sub-menus will be for the item in question.
;Adjust
:The right button, Adjust, is the complement of the Select button. Using Adjust performs an action that is complementary to what the Select button would have provided. For example, Select-drag brings a window to the top when moving it, while Adjust-drag does not. Select-click on a Filer window's close box closes the window, while Adjust-click first opens the parent directory's window. Select-click sets the Filer (file manager) selection, while Adjust-click toggles the item within the selection. The Adjust button replaces the need to use modifier keys during mouse operation.