how do you post pictures?

Jiayin, when you are creating your post, there is a button with a picture of a landscape on it, above all the smilies. Click on it. Some tags will appear in the text box: {img}{/img} (only the {}'s will be []'s). Between the two tags, type in the URL of the picture you want to post. Here's an example:
{img}http://www.guiamania.com/debate/images/avatars/young_mimitchi.jpg{/img}
Which turns into:

...in my post. You can check to see how your pictures will look by pressing "preview" before you press "post".
This only works if the picture is already somewhere on the Internet. If you want to post one of your own pictures, you need to find an image hosting website. But that is another question.
This question really belonged in the
Feedback Board. You could also have checked the
Forum Help Page. Hopefully Kat will split this topic here.