By default, when you create a new block in many cases the block will be composed of two items - an editable text area and the particular item, a gallery, a map or an FAQ list etc. By default the text is shown above the item on desktop, but by going to EDIT BLOCK > Edit Styles you can change this so that they both show side-by-side or the text can be below the item.
The Gallery in this block has had the spacing removed in Edit Styles giving a different effect.
You can do the same with a map, and in this case you'll see we've rounded the corners in Edit Styles which may suit some site designs.
On a small device like a mobile phone the text and the item will always be shown one above the other.