In TARGET I use the following for a closeup view of left MFD, right MFD and HUD:   
DCS A10C.tmh: 
define CloseUpHud CHAIN(DOWN+KP0, KP5) 
define CloseUpLeftMfd CHAIN(DOWN+KP0, KP1) 
define CloseUpRightMfd CHAIN(DOWN+KP0, KP3) 
define CloseUpReset UP+KP0   
DCS A10C.tmc: 
 MapKeyIO(&HCougar, H3U, CloseUpHud, DMS_Up); 
MapKeyIO(&HCougar, H3D, CloseUpReset, DMS_Down); 
MapKeyIO(&HCougar, H3L, CloseUpLeftMfd, DMS_Left); 
MapKeyIO(&HCougar, H3R, CloseUpRightMfd, DMS_Right);