Use course tools>>Discussion Board>>Participate in a forum
You can select or deselect forum messages individually or all at once.
Click Show Options on the far right above the messages or click to display the option buttons.
Select or deselect messages as follows:
To select an individual message, click the box to the left of it so a checkmark appears.
To select all the messages, click Select All.
To deselect an individual message, click the box to the left of it, if necessary, so the box is clear .
To deselect all the messages, click Unselect.
To select all the messages that are currently unselected and deselect all the messages that are currently selected, click Invert.
After you select messages, you can:
Collect them to view on one page.
Lock or unlock them.
Remove them.