TM 1-1510-225-10 3A-50 (16)   Line Select Keys.   Pressing a line select key  will  place  the  cursor  in  the  field  next  to  that  key.   Dots  displayed  on  the  sides  of  the  display  indicate active    line    select    keys    for    each    individual    page.   Pressing the  ENTER key will display the next step of the highlighted selection. (17)   Direct To Key.  Pressing the direct to key, placarded   D  , will cause the first page of the direct to section   to   be   displayed   on   the   flight   management system control-display unit.  The next sequential page in  the  direct  to  section  will  be  displayed  with  each subsequent press of the  D   key. (18)   Next  Page  Key.    Pressing  the  next  key, placarded  NXT,  will  cause  the  next  page  of  a  section or subsection to be displayed on the flight management system control-display unit. (19)   Previous     Page     Key.          Pressing     the previous key, placarded PREV, will cause the previous page of a section or subsection to be displayed on the flight management system control-display unit. (20)   Message Key/Message Annunciator.   The  message  annunciator  will  flash  to  alert  the  crew that  a  message  needs  to  be  viewed  on  one  of  the System Messages or Sensor Messages pages. Pressing the message key, placarded  MSG, will display  the  message.    The  newest  message  will  be indicated   by   a   flashing   asterisk.      If   the   message requires action to be taken by the crew, the message annunciator  will  remain  steadily  illuminated  until  the action   is   completed.      If   no   action   is   required,   the message annunciator will extinguish when the message page is exited. (21)   Display.      Flat  panel  color  liquid  crystal display.  The display is color coded to assist the crew in recognizing information as follows. (a)   Magenta.      Magenta   is   used   for   to waypoint, VNAV, and TGT speeds. (b)   Cyan.      Cyan   is   used   for   date   and time, tuned frequencies or codes, GRI's, and altitudes. (c)   Green.   Green is used for navigation, fuel data, and general page data. (d)   Red.  Red is used for warnings. (e)   Blue.      Blue   is   used   for   waypoint numbers. d.  Pages Displayed at Power-Up. (1)   Self-Test   Page.       The   Self-Test   page, Figure  3A -24,  appears  when  power  is  applied  to  the system.    While  the  Self-Test  page  is  displayed,  the computer performs a self-test that must be successfully    completed    before    proceeding.        If    a problem  is  detected,  the  SELF-TEST  display  may  be replaced by a NO DATA RECEIVED message. Figure 3A-24.  FMS Self-Test Page (2)   Initialization  Page.    After  the  self-test is completed,  the  Initialization   page,   Figure   3A-25,  will display. NOTE The  Initialization  page  cannot  be  recalled once   DATE,   GMT,   and   POS   have   been entered.      The   Initialization   page   may   be displayed  again  by  removing  and  then  re- applying power to the system. Figure 3A-25.  FMS Initialization Page