Youtube video demonstrates the dynamic nature of the HUD symbology depending on the sensor of interest and whether or not it is within the HUD field of view (fov)
Click here! HUD symbology behavior during navigation, target designation and pursuit.
SOI sensor of interest
TAD tactical display
TGP targeting pod
HUD heads up display
TVV total velocity vector where the plane will fly to if continues on course
FOV -field of view
SPI Sensor of interest- has tail that points towards TVV if within HUD FOV
or to SPI from TVV if SPI is out of HUD FOV
tadpole - point to waypoint or steer point
Zoom out to see SPI marker clamped to edge using
Right Shift + Right Control + either the asterisk * or minus - key on keypad.