In the Find dialog box, you can find this new feature in the tab 'Geo attributed':
You can specifically filter on all point, only the lowest points or only the highest points.
You also have the option to search for overlapping lines.
You can now select any object and search for similar objects with the Find dialog box.
Simply select an object, rightclick it and choose "Edit - Find with same attributes..."
The Find dialog box will appear and automatically fill in all the attributes that can be recognized from the selected object.
If you then search, you'll have a list of all similar objects in the drawing.