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Refer to figure.
In this image of a typical FMA why is "VOR/LOC” in a smaller font of a different colour?
  • A
    To help them distinguish between engaged modes and armed modes. MCP SPD HDG and ALT are engaged, and VOR/LOC is armed.
  • B
    Because all modes are in a small font when first selected. After 5 seconds the font changes and the caption replaces the last mode in use in this example HDG.
  • C
    Because modes selected by buttons on the MCP are always in a large green font Managed modes selected via the FMC are in a small white font until the programmed parameter is achieved, when they change to a large white font.
  • D
    Because modes based on ground radio navigation facilities are in a different font size to remind the pilot that they need to be tuned before use.

Refer to figure.
EFIS equipped aircraft display the appropriate information on the PFD/EADI in an area called the Flight Mode Annunciator.

Here all the modes for the FD autothrottle and autopilot are displayed. Newly changed information is often emphasised on the FMA type display by surrounding it in a box.

Engaged or captured modes are shown at the top of the flight mode annunciation boxes in large green letters. Armed modes are shown in smaller white letters at the bottom of the flight mode annunciation boxes.

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