How do I attach a PDF file to an email? I'm trying to attach a PDF file to an e-mail I'm composing, but clicking on attach option shows only image files. 

How can I make it show other files / attach other files ? 

(Note: I'm using the e-mail client, not the G-mail one).
You need to add another file browser besides the built in Gallery. 

ASTRO File Manager should fit the bill nicely.