A matrix flag box is an LED matrix that draws race information as symbols rather than as a bar of colour. Its page is Daniel Newman Racing > Flag Boxes.

Gears tab. Turn on gear number animations, choose where the number sits with Right Side (the default), Left Side or Both Sides, and pick the gear colour theme. Redline colours are chosen automatically to match the theme.

Warnings tab. Oil and water temperature warnings for supported sims, shown in your SimHub temperature unit, plus a maximum duration in seconds for time penalty warnings.

Effects tab. Marshal flags, spotters, engine start, all pit lane effects, low fuel, and an iRacing only pit box countdown that needs the third party RomainRob SimHub plugin.

Running a pair. With two matrix flag boxes, Show Critical Flags on Both Matrix decides whether Yellow, Safety Car, Black, DSQ and Red appear on both boxes or only on the left one.

Redline behaviour is Static or Flashing, and gear colours are disabled while Universal Theme is on.

The idle screen has its own tab and its own options.