For most blocks you can simply click in the block and edit the fields directly. To see the block’s type, hover over it and a grey label will appear in its upper-left corner. The most common block is Classic Paragraph. You can type in this just like you would any word processor. It has options for styling the text such as bold, italic, centered, and heading (which affects the font’s size).
Some blocks may contain images. A Gallery contains a group of images which can be rearranged by clicking and dragging or removed by hovering and clicking the black X. Add more images by clicking Add to gallery. This will bring up the Media Library where all images on your site live. You can add any of the images from your library by clicking them. Or go to the Upload Files tab to add new images. When finished, click Select in the lower-left corner to add your images to the gallery.
A Note About Images: When uploading new images, it is important that they have Alt Text. This field is visible form the Media Gallery when an image is clicked. This text should be a brief description of the image. This text will be read to users using a screen reader to visit your website. It is also read by search engines and can impact your search ranking.