What is this symbol?

[novaflooring]

Hi Folks,

I'm somewhat new to Fusion and I was wondering if anyone knows what this symbol is. I am remixing an existing design that utilizes the 'Form' function for modeling.  If anyone knows, please let me know.

Thanks

[laughingcreek · Accepted solution]

projection constraint.  the line has been projected into the current sketch from an earlier sketch or body.