Blackberry 6210 - Manual (Page 89)

Filing email messages
Handheld User Guide 89
Messages screen menu - File item
3. Select the folder in which you want to store the message. To expand the
folders that appear on the Select Folder screen, select a folder that has a plus
sign (+) beside it, and click the trackwheel to view the menu, and click
Expand.
4. After you select the folder in which you want to file the message, click the
trackwheel to view the menu. Click File.
Select Folder screen menu - File item
Tip: To collapse folders, select a folder with a minus sign (-) beside it, click the
trackwheel to view the menu, and then click Collapse.