The annotation command attaches some informal text to a goal. This informal text appears when a proof is printed using the printed proof command.
The annotation command is applicable to an entire goal. A dialogue box allows entry of the informal text. That box is primed with the previous response in the case of a goal whose previous proof attempt was an annotation command. This supports both interactive inspection of annotations and correction of typos.
"annotation" "text" g
This example applies the annotation command to the goal g giving it the annotation ``text''.