Story Level Lines

Go to Design > Story Settings, and for any selected story, uncheck the “Story Level Line” box. This story’s level line will henceforth not appear in any model window in the project.
Click on a Story Level Line endpoint, then double-click to place the dimensions.
Choose the Design > Edit Story Levels command, or the same command from the context menu that appears by right-clicking inside the Section window.
Click OK to apply changes and exit Story Editing Mode. Associative elevation markers will be updated too.