You can find these menu items by right-clicking on the selection:
ASCII85
This is a standard ascii85 charset strictly from ! to u. Regex: [!-u].
This charset is compatible with all ascii85-encoders/decoders.
vwx85
vwx85-charset differs from ASCII85 only by replacing the following three characters:
" to v
' to w
\ to x
This allows you to quote a string containing vwx85-encoded data without experiencing character conversion issues.
For decoding, if you want to use a decoder that does not support this substitutions, you must first change these three characters back and then use the standard ascii85-decoder.
vc85
In vc85 charset all the symbols are visually different from each other.
All special characters (except for "_") are replaced with letters of the Cyrillic alphabet.
Thus, the vc85 understands two variants of characters: ascii85 and alternative.
Alternative symbols are listed in the table below in the second column, next to the ascii85 ones: