Visio Line Question

Visio Line Question
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How do you create a long curvy seamless line in Visio.?

Whenever I draw a line it seems to have only the ability to connect objects and that is all.
What f I want to draw a loop that starts from one object and then swoops over the top of another object to make a 300 degree arc?

I have tried this with lines drawn end-to-end.  How do I merge the lines together into one seamless line?