Markers are special game objects used to set as destinations for moving characters. These Markers that are represented with a big yellow arrow.
To create a Marker go to the Hierarchy Panel and select
GameCreator → Navigation → Marker. Drag it to the place you want and rotate it.
Setting a Marker as a destination will cause the character not only to move towards it but also face the direction the Marker is looking at.
Since version 0.4.1 you can also change the color of a specific Trigger arrow. By doing so, you can create a color-code to visually identify which one does what.