How to make a spring arm unable to collide with world objects?

I have a spring arm which is attached to my character, I’m trying to make it unable to collide with other objects. The problem is, it’s within the character blueprint, so I can’t just make a custom collision object channel.

In the spring arm details you can set it to do not collision, or set a specific channel

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not sure what you mean about the custom channel. You could make one just for the spring arm, in case you wanted only certain objects to block it. Just set it there in the probe channel

How do you open the spring arm details?

Click on it in the Components panel:
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Then the Details panel will shows its details. If you cant see Components or Details go to Window menu tab and click them.

okay, thank you for the help!