Click any text to edit or style it. Select text to insert a link. Click blue "Gear" icon in the top right corner to hide/show buttons, text, title and change the block background. Click red "+" in the bottom right corner to add a new block. Use the top left menu to create new pages, sites and add themes.
Full width intro with image background, color overlay and a picture on the left. You can easily change the size of image in block parameters.