Click Show Options
on the far right above the messages or click the down arrow 
to display the option buttons.
Using course tools>>Discussion Board>>Participating in forums
You can select multiple messages in a Discussion Board forum to display on a single page. This feature is useful when you want to view several messages at once.
Click Show Options
on the far right above the messages or click the down arrow to display the option buttons.
Do one of the following:
Select each message you want to view by clicking
the box 
to the left of it.
Select all messages by clicking Select All.
Click Collect. CourseCompass displays the selected messages together on one page.
Note: To print the messages, select File > Print on your browser's menu.
Click OK to return to the forum.