Sometimes the best tips are the simplest. They can often be forgotten about or never learned because of that. Here’s a reminder for those that may not know or have forgotten…
In CADmep, or the 3d viewer of ESTmep or CAMduct, you can hold the Control key while clicking the attacher arrow to rotate the arrow 180 degrees. The below screen recordings are both done from CAMduct but ESTmep or CADmep work just the same.