Konsole uses the notion of scrollback to allow users 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), Shift+Page Down (to move forward), Shift+Up Arrow (to move up a line) and Shift+Down Arrow (to move down a line) keys.

The amount of scrolling using Shift+Page Up/Down can be switched between half and full page in the Scrolling tab of the profile configuration window (use Settings → Edit Current Profile... to open this window).