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These anchors are customizable as you can create and determine a custom position within the scene either manually or using the VR Editorthe VR Editor (currently this feature is being redesigned).
Other Types of Anchors
Named Anchor (Catalog Type): Anchor that exists inside the APK (predetermined) and is not configurable. Scene Anchors are found here.
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Another great Resource is the VR Editor. Using this feature, you are able to place the positional anchor in the Scene within the headset. For full instructions, click here.
Example: Playing Media at Positional Anchor
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The World Object Proximity Condition is met when the learner is within range of the specified world objects. In this example, I want a screen message to appear once the learner moves to a certain location that I've determined with my "Anchor 2".
Using the VR Editor, I've placed my "Anchor 2" in front of the paint cans in my Workshop:
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