ALL POSTS page, change header bar

ALL POSTS page in admin – header bar – has a bunch of items I don’t need there – tags, categories, author, etc. I also can’t adjust width, so post titles take up multiple lines.

(It’s in may admin area, so I can’t link. I can’t figure out how to upload a screenshot here, either. Apologies. If needed, I could upload somewhere and post a link url)

Can I remove headers?

Can I adjust widths?

thanks!

The page I need help with: [log in to see the link]