How to post pictures from my own documents?

[Exo Pheratype]

I know how to post pictures from a website. Copy image, paste, and put in [img].

But how do I post pictures from my own documents, all I see is copy and thats to copy words, not images?

[Ad Bot]

[Truce]

Upload them to a hosting site, like TinyPic or Photobucket.