You can move and position legend frames in the Legend Designer window by snapping them to a background grid or guideline. Snapping is an effect where you move a legend frame near a guideline or a grid line and it aligns and attaches (snaps) to the line. This is useful for accurately positioning legend frames.
When working with the grid and guidelines, you may want to zoom into or out of the view in the Legend Designer window. For instructions on how to do this, see Zooming the Legend Designer Window View.