Example post for graphic standards
Write everything in here. The spacer on the right should be 4 units wide, or approximately 1/3 of the width. If you add an image, it can be full width. Change the "design" option to "Card" and add the caption there.
When you continue adding text, be sure to add another spacer, but be careful that the spacer is only next to the next text block and not applied to the entire post (a dark black line will appear that is just the same size as the text block you are editing).