MindMup now allows you to add arrows to regular connectors, in addition to custom links as before.
Click on any connection line and you’ll see a pop up menu. Use the Add Arrow button, and an arrow will appear pointing from the parent to the child node. Click the connection line again to reverse the arrow, add it to both ends, or to remove it.
Arrows work well in combination with other line properties. Change the line type to show an implied relationship, or make it thicker to signal connection strength.