Sending a message to multiple students regarding an assignment can be accomplished by following the steps below.
In Course Navigation, click the Marks link.
Hover over the assignment title and click the drop-down menu.
Click the Message Students Who... link to create and send a message.
Select whom you want to send the message to by clicking the drop-down menu and selecting the type of recipients you want to message.
Based on real-time data, Sublime LMS ™ will show the names of the students who fall in the category you selected [1]. Type a message to the students in the message field [2]. Click the Send Message button to immediately send the message [3].