Zero-Point Object to hold line crossing

[Harald Oehlmann <Harald Oehlmann Elmicron de>]

Hello List,
I often have three lines ending in one point like that:

---->X<---
     |
     |

Is there an object, which just have a connection point and nothing else?
So, the X point will hold the lines when they are moved?

It is like a line with a fix connection point somewhere which does not
move when the line ends are moved.

It is often possible to use the middle connector of the straight line,
but this will move.

Thank you for any ideas and the brilliant program,
Harald