It's very easy to create a page header gallery.
The first input box you encounter when you create a new page will request a name for your page. The next input group will be the Master Subpage Content panel (see below) containing the page header gallery component. Here is where you will place, update, reorder, and delete page header gallery photos.
Click an add image button in the page header gallery component.
The Media Library panel will pop up as seen below.
You will have the option of adding an existing image or uploading a new image. Once you have chosen your image from the media library, it will then appear as a thumbnail in the page header gallery component.
You have the option of adding a caption to your photo in the caption input box to the right of your picture thumbnail (see above).
You will continue to add all the photos to your gallery. Please note that there should be a minimum of at least 7 photos. Otherwise, there will be a black section where there should be a photo (see below).
Use the roll-over buttons on the right side of the thumbnail block to delete, update, or add new photos. Click the plus and minus circle icons to add or delete photos.
To reorder your photos: