This is an Image & Text block. Click on this text to start editing and enter your own text with some basic formatting. Just click anywhere outside the text box when you're done to continue working on the rest of your page.
Hover your mouse over the image opposite to show the image toolbar. Image Settings lets you choose an image from your library, or upload a new one, and change related settings. The crop tool lets you select the Aspect Ratio, or proportions, of your image and position the image within the space. You can also drag and drop images directly from your computer on to this page, and they will be uploaded to your image library automatically.
To change the layout and appearance of a block, such as the size of its images and columns, click on the Change Layout button on the block toolbar, to the right of each block.