toolbar definition operating system
A common graphical user interface
component, consisting of a permanently visible row of button icons
that, when clicked with the mouse
, cause the program to perform some action such as printing the current document or changing the mode
The toolbar buttons often invoke functions accessible via menus
but they are easier to use since they are permanently visible. A typical use would be in a paint
program where the toolbar allows the users to select one of the various painting "tools" - brush, pencil, bucket etc.
Some application programs
under some operating systems
may allow the user to customise the functions accessible via toolbars; in others, the choice is fixed by the programmer.