RE: Pictures?
This information can be found in the help link. Here is what it say's.
Can I upload an image or attachment to my post?
You may attach a file to your post. The allowed file format and the maximum file size will be displayed when you click on "Click here to upload".
For graphical files (jpeg, gif, bmp, png), you can embed the uploaded picture in the post directly by checking the box: “Embed picture in post”.