

Konsole uses the notion of scrollback to allow user's to view previously displayed output. By default, scrollback is on and set to save 1000 lines of output in addition to what is currently displayed on the screen. As lines of text scroll off the top of the screen, they can be reviewed by moving the scroll bar upwards, scrolling with a mouse wheel or through the use of the Shift+Page Up (to move back a page), Shift+Page Down (to move forward a page), Shift+Up Arrow (to move up a line) and Shift+Down Arrow (to move down a line) keys.
When the scrolllock is on, ordinary input and output from the shell is suspended, and you can scroll through the history with Page Up, Page Down, Up Arrow and Down Arrow.