A device placed in front of a lantern which allows the colour of the light to be changed remotely. Scrollers usually consist of a roll of gels which scroll in front of the lens on receiving a DMX (qv) command.
colour change unit fitted in the colour runners of a lantern. A scroll, made up of a series of pieces of gel is drawn across the front of the lantern, thus changing the colour of the light emitted. See also ColorFader, semaphore unit, colour wheel.
Scroller is a replacement for the command "while true; do clear; xxx; sleep 10; done". It uses ncurses to redraw the new output much more smoothly, and truncates the output to the size of the screen, without causing the program to abort.
A dark gray vertical or horizontal bar that contains a scroll knob and scroll buttons. Scrollers are displayed along the left side or bottom of an area that you can scroll through.