I’d like to excuse myself for my English, I’m not a native speaker.
So my question is:
If I got two object, - is it possible to place one vertex from object 1 and one vertex from object 2 at the exact same position ? Hopefully there is an easy way to do so.
Yes, I can think of two rather easy ways to do that.
Use the Vertex Snap to snap vertices of the edited object to vertices in other objects.
Snap settings are by the magnet to the right of the layer buttons… you probably just need to select “Vertex” in the first dropdown.
Then you can either toggle snap with the magnet icon, or temporarily activate it any time by holding down Ctrl.