Arrow visual link
How to use it
Draw an arrow pointing from one element on the page to another element on the page.
When to use it
If you have two elements on the page that you want to associate with each other, but for whatever reason can't put them close to each other/align them, you can literally draw an arrow, starting at one element and pointing to the other.
What to watch out for
If the arrow is too thick it might overpower other elements in the area.
This technique might "cut across" other elements on the page, so be careful to make sure you can stick an arrow on the page pointing from one element to another without it getting in the way.