typing <: will start the emoji auto complition inside the plantuml editor
for the sake of simplicity the emoji preview of the completion (suggestion) documentation will fetch the image from the original github repository (not plantuml). The reason is that the images (SVGs) inside plantuml have sometimes removed their svg tag, hence it's difficult to set the correct rendering size.
editor setting: expand auto completion (suggestion) documentation by default
<:will start the emoji auto complition inside the plantuml editor