Method 1: Page Editor (recommended)
Go to the Page Settings, either in the side menu or the page editor.
Click on the pictures to make them bigger!
Method 2: From the Side Menu
Note: Don't edit link settings
Highlighted in the left menu is a LINK. You don't want this!
Scroll down until you find the corresponding PAGE.
Changing the Banner Text
Go down to 'Page Description'.
Type in the title you want. In the image below, it is highlighted in below. Make the the text bold.
Changing the Image
Go down to 'Thumbnail Image'
Remove the current image.
Press the 'Add Image' button. That's it!