Updating Placeholder Fields of a Callout
The placeholder fields in callouts link to the drawing boundary. Using this link, the callout’s placeholder fields evaluate and display the corresponding property values of the drawing boundary.
In 2D, you cannot use section and elevation callouts to automatically create section and elevation views because they expect 3D models. So in 2D, you need to place the section or elevation callouts without creating the view and add section callout links to the drawing boundary.