The pages for the current issues of Canadian coins are cluttered with repetitive comments that are not specific to a single year.
I'm proposing to have them listed under "general comments" like so:
'W' (mint mark) - non-circulating coins struck at the Winnipeg Mint
'P' (composition mark) - multi-ply plated steel planchet
'm' (privy mark) - Royal Canadian Mint logo
I prefer the use of a lowercase "m" for the logo to differentiate it from the other letter marks. Moreover it resembles the lower part of the logo's design.