I tried a few new functions found.
For some, so far nok (tried in Avionics70 only):
I tried SymbolType=MISSILE_TOF and then tried SymbolType=MISSILE_TOF_TEXT in case of ... but none displayed something
I also tried the font overrides:
// --- Per-symbol font overrides (optional) ---
TextFontName=Arial
TextSize=14
TextBold=TRUE
TextItalic=FALSE
TextUnderline=FALSE
TextStrikeOut=FALSE
TextShadow=FALSE
ShadowColor=0.0,0.0,0.0,1.0
ShadowOffset=1
TextOutline=FALSE
OutlineColor=0.0,0.0,0.0,1.0
OutlineSize=1
in a TEXT entry, and also added them in [RadarFont] but also no effect.
On the opposite, for "SymbolType=MASTER_ARM_TEXT", I knew the simplified one, but I could test successfully the options "OnText" OffText" and "HideWithGuns=TRUE" that were unknown so far.
For those that did not work I can assume they are there as provision, or leftover from the library, but not coded yet, or code removed because unused for optimization.