At the risk of a) sounding like a real newbie  b) being accused of not Googling for an answer (which I did - but apparently overlooked)

I am wondering how I can bind an external variable using just XQuery syntax in the BaseX GUI.

I have found how to set the variable via command line options, and how to do it in Java, but I merely

wanted to run a quick interactive test in the GUI  to test an idea of mine (before writing a bunch of Java code).

What I have done is in a tab in the GUI, I have included the module, and before running a function, want to set that external variable.

Surprisingly I found myself at a loss on how to do what appears to be a simple task.

So, thanks in advance for any help....and for the rest of this community for not laughing at me too loudly

Buddy