Start by creating a message template. Next, choose the candidates from the list and click Send message on the bar that appears above the list. A window with a message will pop up:
Click the Select template icon displayed under the message, just next to the Send button, and select a template from the list:
If there are personalized elements in the message (e.g. the recruitment that the message is connected to or the name of the client this particular recruitment is for), you will be asked to choose them: