[Chessx-users] Viewing complex PGN files?

[Fex X. <fs...@gm...>]

I have been having difficulty viewing complex PGN files with nested
variations in ChessX (mac) and wonder if anyone can help me. These are
files with many deeply nested, long variations and subvariations. (Probably
30 or so variations at a depth of 3 or 4 sometimes, around 5-10 moves in
some cases. By "depth of 3 or 4" I mean, the main line is depth 0, a
subvariation of that at depth 1, a subvariation of that at depth 2, and
subvariation of that at depth 3).

What happens is that the indentation stops making any sense that I can
perceive. I am not even sure that ChessX supports this. I have tried
modifying the Appearance parameters but it does not help much.

So some questions:

(1) What is the best way to view these kinds of deeply annotated, nested
PGN file in ChessX (or any other program for that matter).

(2) Can I easily "split" the PGN file into smaller files with subvariations
that might be easier to handle, e.g., write a position and its subtree to
another file or something like that?

(3) What does the "Show Diagrams" option in Appearance Menu mean? It
appears to have no effect and I cannot find any documentation for it.