In a "compass" view, tap the compass.

If your speed is greater than 15 km/h, the "quick mark" dialog appears, in which you can

• Mark a speed camera (use "+" and "-" buttons to adjust a speed limit if required).
• Mark a "general" point, to sort it out later. The point is named after its coordinates.
• Open a point details dialog.

If you are moving slower than that, the point properties dialog will open.