## Edges

You can control how “spread out” your map looks by adjusting the spacing slider:

This affects the spacing between groups and not nodes. The higher the value, the further apart your groups.

### Link length

While the group spacing slider controls the spacing between groups, the link length slider controls the distance between nodes:

The larger the value, the further spaced nodes will be. For aesthetic purposes, we recommend that if you increase the link length, you also increase the distance between groups.

### Arrow direction

Customize in which direction arrows point. The default (aka "Normal") direction is from source → target. For example, if there is a relationship in which Math 2 is the source, and Math 1 is the target, then an arrow in the Normal direction will point from Node 2 to Node 1:

Depending on the way you name your relationships, you may want the arrows to point in the reverse direction. For example, it is usually easier to list prerequisites of a course, than to list the follow-ons of a course. In your Excel then, you have prerequisite relationships pointing from source to target. However, viewers are used to arrows signifying a path of advancement. This is a common use case for changing the directionality of the arrows.

You can change this setting such that arrows point in the reverse direction:

Be careful: This is simply a visual change — your data remains the same. Changing the directionality of the arrows often leads to confusion when selecting mouseover pathways (see below).