Type Parameters of Families

Are we able to update type parameters for all of a given family type through dynamo. Like arrowhead style for all text types?

Hello John,

As a matter of fact, you can change the parameters of all text types:


However arrowheads are notoriously difficult to extract and you need to feed an “ArrowheadType” into the SetParameter node.

You could try to select arrowheads if you know their exact names:


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Dimitar you are the man! Thank you so much for your help! I was trying to create a node to set all of our text to have the same arrowhead types for consistency through a project. I am all set now thanks to you!


I hope to one day be a dynamo guru as well.



Sorry to Necro this thread. I can’t quite make out the image that Dimitar_Venkov posted.

I’m trying to replace all the arrowheads for types in a family. Is this still a valid way of doing this? If so, can someone help me out and guide me through the process?


If you need more assistance. Go ahead and start a new thread. :slight_smile:

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Thanks John!

I’m very new to Dynamo. So once I get all the instances of types using a specific arrowhead, how do I replace it?

You need to set a type parameter for this. Go ahead and edit the custom node “Arrowhead Assigner” in Rhythm and it should guide you in the right direction.