How to change the header in the Trader forum?

I posted a want to sell some time ago listing two rifles and a lot of parts. Both rifles have sold. As I find more parts to put on the trader, I prefer to add them to my original WTS, but the title no longer represents what is actually for sale. I can edit my post, but can't figure out how to change the title that shows when you open the trader forum.

Can a user change the title, or do I need to start a new thread when I list new items.

thanks for your help.

I'd open the post on the computer browser, not tapatalk, and use the advanced button for edit. That will allow you to change the header.

Sent from my SM-T813 using Tapatalk

Homer2 said:

I'd open the post on the computer browser, not tapatalk, and use the advanced button for edit. That will allow you to change the header.

Sent from my SM-T813 using Tapatalk

Click to expand...

that is what I have been trying, it does not work.