The two sextuplets should be connected by a primary beam, which is broken to avoid awkward position. I am only able to have their respective beams broken, which gives more beam lines than desired. How can I get a broken primary beam with one beam line?
I’m not quite sure I can visualise what you’re trying to achieve, but the beaming functions are under a right click, or Edit > Notations.
Thank you for your attention, but I fear there isn’t what I need 
Yes, but with the primary beam broken. Like this
The 32th notes are connected to the 8th note by one beam line rather than three
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