actually it's an easy question, but I could find an answer with Google or the included search on StackExchange ;)
How do I add in the middle of the line a node with Tikz? I want somethink like this:
Normally I did it with an additional
node at command. If I will resize the the arrow then I need to change the position of the node also.
Which is not the best way for big things. I try to find something in the manual and didn't find an answer yet.