The Placement section of the Beam Annotations tool allows you to specify which beams you intend to annotate (either all in view or just the beams selected). As noted on the Beam Annotations tool, Revit does not overwrite existing tags.
To place new annotations and remove existing tags on beams in the current file, select Remove existing beam tags and spot elevations. All tags and spot elevations will be removed from beams in the current file and replaced by those specified in the Beam Annotations tool. When deselected, no annotations will be placed on beams with existing tags.
Beams that are already tagged in linked models will show the new annotations as well as annotations from the linked file.
Beams in the linked model will display the annotations in the linked file and will not be tagged with new annotations.
Click the Settings button to open the Placement Settings dialog and adjust the offset of tags and spot elevations from beams.
The Horizontal End Offset and Vertical Offset settings adjust the distance of tags and spot elevations from their attachment points (see Structural Framing Tag Families) by the entered measurement. This measurement is representative of the drawing scale and its default is 0" horizontally and 3/8” vertically.