[Therion] User-defined symbol with orientation, l-size and r-size options

[emmanuel.vitte at laposte.net]

Hi all, 

I would like to draw a large water-flow,not as a simple line, and show its direction. 

I try to define a user-defined symbol with orientation, l-size and r-size options. But Therion (v 5.4.1) answers that theses options are not valid with type u. Is there an options or a way to enable theses options? 

Thank's 
Emmanuel 
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