Here's where I wish there was a simple way to make compound icons (rather than entering it all manually)
I don't see an easy solution for that, as the possible number of compound images is overwhelmingly large. So only those that would occur very frequently (such as B-N or R-N) can have their own name, and it was for this that the possibility of drawing compounds was created.
The default.ini file in the SVG directory does allow the definition of set-specific meaning of (dressed) letters in FENs, though. This to iron out different naming unorthodox pieces often have in different sets (e.g. archbishop, cardinal, KnightBishop for the BN piece, which in FEN should be B~ no matter what set is in use). Since you can combine 26 letters with 7 suffixes (' ` " ~ ^ : !) that would still allow you to define a reasonable number of easily accessible custom abbreviations. The problem is always to remember what those mean.
I don't see an easy solution for that, as the possible number of compound images is overwhelmingly large. So only those that would occur very frequently (such as B-N or R-N) can have their own name, and it was for this that the possibility of drawing compounds was created.
The default.ini file in the SVG directory does allow the definition of set-specific meaning of (dressed) letters in FENs, though. This to iron out different naming unorthodox pieces often have in different sets (e.g. archbishop, cardinal, KnightBishop for the BN piece, which in FEN should be B~ no matter what set is in use). Since you can combine 26 letters with 7 suffixes (' ` " ~ ^ : !) that would still allow you to define a reasonable number of easily accessible custom abbreviations. The problem is always to remember what those mean.