The barometric reference selector selects and sets the barometric reference. This selector has three controls, outer, middle, and inner. The baro reference outer selector selects either inches of mercury (IN) or hectopascals (hPa) as the barometric reference on the related PFD. The barometric middle selector sets the barometric correction. The inner push-button switch selects the standard baro setting 29.92 inches of Hg or 1013 hpa.
ND Controls
The ND mode selector enables either the approach (APP), VOR, MAP, or PLAN modes. Use the center (CTR) push-button to toggle between an expanded display that covers 90 degrees and a centered display that covers 360 degrees in all modes except PLAN.
The ND range selector controls the map range or display range in the MAP or PLAN mode. This selector also controls weather radar range and TCAS intruder symbol range in the expanded APP mode, expanded VOR mode and MAP modes.
The traffic switch selects or cancels TCAS traffic data.
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PRIMARY DISPLAY SYSTEM -EFIS CONTROL PANEL

The VOR/ADF switches show radio navigation aid data in all modes except PLAN. The OFF position causes the VOR and ADF information to go out of view. Bearing information shows on the compass rose when you set either switch to VOR or ADF. VOR/ADF identification or frequency data also shows in the lower corner or the display. Co-located DME distance shows when the switches are in the VOR position.
These ND map switches cause data to show on the NDs or cause data on the NDs to go out of view:
*
Terrain (TERR)

*
Weather radar (WXR)

*
Station (STA)

*
Waypoint (WPT)

*
Airport (ARPT)

*
DATA

*
Position (POS)

The terrain map switch causes ground proximity warning computer (GWPC) terrain data to show.
The weather map switch causes weather radar (WXR) data to show.
The station map switch causes navigation aids not in the flight plan to show.
The waypoint map switch causes waypoints and ground reference points to show.
The airport map switch causes airports not in the flight plan to show.
The DATA map switch causes route data to show.
The STA, WPT, ARPT and DATA switches affect the map background display.
The position map switch causes VOR/DME and air data inertial reference system (ADIRS) position data to show on the map display.
Alternate Control Panel Functions
The left and right control display units (CDUs) provide alternative EFIS CP functions. CDU menu selections enable the alternate EFIS CP functions.
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PRIMARY DISPLAY SYSTEM -DISPLAY SELECT PANEL

Purpose
The display select panel (DSP) controls the formats on the two inboard and the center lower display units.
Physical Description
The DSP is 3.5 inches by 3.45 inches and 3 inches deep. It weighs 4 pounds.
DU Selection Controls
There are three switches at the top of the panel. The labels on the switches are L INBD, R INBD, and LWR CTR. Each switch has a light that comes on when you set the switch. The switches select which display unit (left inboard, right inboard, or lower center) responds to the mode select switches. The three select switches are latched electronically, only one switch is active at a time.
Mode Controls
The mode select switches are alternate action switches that control the display of these formats:
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ENG: Engine secondary

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STAT: Status page

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ELEC: Electrical synoptic

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HYD: Hydraulic synoptic

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FUEL: Fuel synoptic

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AIR: Air synoptic

*
DOOR: Door synoptic

EFFECTIVITY
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GEAR: Gear synoptic

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FCTL: Flight controls synoptic

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CHKL: Checklists

*
COMM: Communication function

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NAV: Navigation display.

On an inboard DU, if you select the same display that shows, the navigation display format will show. On the lower center DU, if you select the same display that shows, the DU blanks.
The status format is an exception. When the status format shows and you select the STAT switch, the next status page shows. When the last page shows and you select the STAT switch, the inboard DU shows the navigation display format and the lower center DU blanks.
The ENG, FUEL, and AIR switches also control information on the EICAS and compacted engine displays when EICAS is in the limited mode.
　
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