In most emulations, the key combination Ctrl +Shift + Alt + Up (or Down) can be used to create multiple cursors on adjacent lines.
You can also create multiple cursors using Ctrl + Shift + |, move to the location where you want the cursor, then use Ctrl + Shift + |, then move to the next location, and repeat. Easy to remember because vertical bar, |, looks like a cursor.
Multiple cursor mode can be cancelled in most emulations by hitting Escape.
