ユーザーノートのアイコンを変更する方法は？

[JammyDodger]

I think you can use the plugin API to do it:

@eviltrout

You can use the plugin api in a theme component or plugin to do something like:

api.replaceIcon('sticky-note', 'heart');

Where heart is the name of the emoji you want to use instead.

You can find more info here: Change icons globally