Ossia vertical spacing

[Phil Holmes]

I'm trying to create an Ossia staff above my main staff, using the 
alignAboveContext property.  This works as illustrated in the NR.  However, 
I'd like more vertical spacing.  The example given in the docs is very 
tight, and mine appears with the clef touching the main staff as shown in 
the image.  I've tried to find what controls the spacing and failed.  Could 
someone point me in the right direction, please?


--
Phil Holmes

Ossia.png
Description: PNG image