The block canvas shows all the components in a block and allows you to edit their content.
By default, new block canvas contain a single text component.
Note: to delete the default text component, you will first have to add a new component.
To delete a component from the block, hover on it with the cursor and click on the X icon.
To change the order of the components within the block, hover on it with the cursor and click on the up or down arrows.