This is a list of action verbs that you have access to for the channel you are in. The list is displayed when you click the Action hyperlink in the Message Input Frame . All actions have a hyperlink so that if you click on any action it is executed in it's simple mode. If an action does not have a simple mode, then help about the selected action will be displayed. An action is a single word that represents a phrase or sentence that describes the action.
Some actions allow a more generic type of input.