Are there any unresolved ambiguities in the standard style of drawing geometrical diagrams?

(is there a standard style of drawing geometrical diagrams?)

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@apocheir @christianp I wrote about the notational thicket for Legendre-Jacobi elliptic integrals a long time ago: https://math.stackexchange.com/a/108659 . As for hypergeometric functions, I personally prefer \({}_2 F_1\left({{a,b}\atop{c}}\middle| z\right)\) to \({}_2 F_1\left(a,b;c;z\right)\) because I don't have to count to where the semicolon is (among other reasons), which becomes even more important for the general case \({}_p F_q\).