A toolbar often allows for quick access to functions that are commonly used in the program.
Some examples of functions a toolbar might have are open file, save, and change font.
Toolbars are usually distinguished from palettes by their integration into the edges of the screen or of other windows.
This can result in wasted space if multiple underpopulated bars are stacked atop each other or interface inefficiency if overloaded bars are placed on small windows.
Some web browsers allow the user to customize its toolbars' contents or location.