In the Place SmartLine tool with the Join Elements option toggled on and when the end point of the line matches the start point, the tool settings will change to display settings for creating a closed shape.

In previous versions of MicroStation, one option was to turn off the creation of a Closed Element, leaving you with just a line string element.

Starting in MicroStation 2023, the Close Element toggle has been removed and a closed shape element is automatically created.

In the case where a linear element is required instead of a shape element, toggle off the Join Elements option. To get a single linear element, use the Create Complex Chain tool to create the single line element.