Adding and Removing Blocks
To add a block, look for an icon with plus sign in a circle. This can be found in the top toolbar, to the right of an empty block, or in the center of the bottom edge of an existing block.
There are several types of blocks. For information about using each type of block, visit WordPress’s support article.
To remove a block, click on it to show formatting options. Then, click the three vertical dots, and choose “Remove Block”.
Blocks may also be duplicated. This is helpful if you’d like to use a similar format for another block and want to avoid formatting a new block.