Many times detailing symbols and callouts are difficult to find and identify in a model containing complex geometry and annotations. So, Markers are placed and displayed wherever a detailing symbol and callout is located to make them easier to find and manage. A Marker is an easily recognizable icon that stands out from the model geometry. Markers available for callouts include the following.

• Detail callout marker
• Elevation callout marker
• Plan callout marker
• Section callout marker