mohaa:
For most of the marker types, you can select just the text, drag it to the other side of the marker, rebuild the section, and the line under the text will move to the new text location. This does not mirror the marker as you asked, but should be close to what you are looking for. These markers are built into the application, so the user does not have a lot of control over them, as opposed to Objects created with GDL.
You should add a Signature to your Profile (click the Profile button near the top of this page) with your ArchiCAD version and operating system (see mine for an example) for more accurate help in this forum.
David