Editor: TinyMce is used as the editor, and on it's official site everyone can find detailed instructions about deal with this wonderful editor.
Metatags - you can edit the contents of description and keywords metatags, ie it is need to give the intelligible description of the page, and keywords by which the page will be found and displayed by search engines.
Photo gallery: - first of all you need to create it by clicking the corresponding button.
Title - there are some gallery settings, you should start here.
Add picture - to add and delete images of .jpg, .gif and .png types.
Edit - to change the captions and titles of images.
Important: To connect to the gallery to the page, you need in Edit mode click on the button Save them all. After that all the changes will take effect.