How to enter a Return of Capital (ROC)

My favorite stock, BGC Partners, spun off Newmark (NMRK) in November 2018. I didn’t pay attention to entering it correctly and now I have to go back and clean it up. Anthropic’s Claude, my new best friend, tells me I have to do a ROC on BGC and then use those funds to buy the NMRK stock. (A) is that how you would do it and (B) I don’t see a ROC choice in the transaciton layout. Thanks and happy easter/passover/Spring renewal/etc. A