To place a building section callout with single point leader and continuous leader line

Select the Place Building Section Callout tool.
In the tool settings window, key in the callout information.
Turn on Leader Type to draw a continuous leader line.
Enter a data point to place the section callout and set the starting point for the leader line.
Enter a second data point to place the second building section callout.
Move the pointer to rotate the symbol to the desired direction, then enter a data point to finish placing the building section callout.

Note: Use Annotation Tool Settings to override the symbology of the callout (for example, cell, level, or color).