To create a gallery, just email post@posterous.com with a more than one picture attached or upload multiple pictures using the Web Editor or Post.ly.

Galleries are a way to show all of your pictures to your Space’s viewers without having them scroll through each one and taking up screen estate that could be better used for other posts on your Space.

Galleries are automatically created by Posterous whenever you upload more than one picture to a post. You can modify galleries by editing a post from your Space and clicking on a gallery:

This will open the gallery editor:

In the Gallery editor, you can expand the gallery to create separate galleries, delete the gallery, or mouse-over any of the pictures to change their order or to rotate them. Click OK to save your changes.