When I run into a character with only one mnemonic, there doesn't seem to be a way to hide that mnemonic. That is, if there were two mnemonics, I could choose between them, but once there's one there's no way to go back to "no mnemonic". Since some of the mnemonics that are in the system are kind of weird and idiosyncratic, I'd like to have the option to choose "no mnemonic" for a specific character.
This is particularly annoying when I come across a character that I already know and for which someone has added a mnemonic recently - some of them are very long and strange, and serve only as a distraction.
I suppose I could add my own mnemonics for those characters but as I said this is mostly for characters I already know and don't need mnemonics for.