Here's a link to a video:
Not sure if it will be any use.
I'd highly recommend referring to your manual, as it contains a lot of useful information that is often over looked by many.
If you have lost or misplaced your manual, here is a link to an online version:
Click Me
Regular maintenance and care of your marker will ensure a long trouble-free-life.
You will often find good 'How to' guides on these (PGI) or other dedicated Dye/Proto forums. just have a good look around.
If you ever need assistance with something you feel way out of your depth with, don't hesitate to contact Dye directly, or an official Dye/Proto Tech.
Contact details for Dye Precision UK & Tech Email:
Phone 44. (0) 208.649.6330
Or
Ash Chaplen
eurotech@dyeprecision.com
Take care of you marker, and it will take care of you