You can edit and remove existing annotations using the more options available for each label:
Adding a new annotation using icons:
Adding a new annotation using the EMOJI keyboard:
Search for emojis on https://emojipedia.org or use the shortcut Cmd+Ctrl+Space on a Mac or Win + period (.) on Windows to open the emoji keyboard.
Adding annotations to cards:
Inside a card:
Editing existing annotations:
You can also use the EMOJI keyboard to represent team members on cards: