snipped from the NOOB guide-- where you can find all the answers typically
Generally, never post an image larger than 1000px for either Horizontal or Vertical.
You can resize large photos or scans on Microsoft Paint.
- Open the image with Microsoft Paint
- "Resize" at the top left
- Select "Pixels"
- Usually 700 - 750 for the longer side is best
Upload using http://www.tinypic.com
(You can resize here as well: Message Board (640x480))
Upload your image, then copy and paste the:
"IMG Code for Forums & Message Boards"
You can also do a Google Image search for images:
Google Images, click on the image, click "View Image", copy the link at the top of your browser, paste it using above.
Other sites to upload:
http://postimage.org/
http://www.photobucket.com (if you use Photobucket, be advised the image will disappear after a period of time)
http://imgur.com/