Screensharing more than one tab efficiently

Hi everyone,
I use a Mac desktop with Chrome browser. I am looking for an efficient way of sharing different browser tabs during a session that allows me to easily switch without having to stop sharing and restart sharing. I was able to do this with ease on my chromebook laptop. I am also unable to share PDFs that i have downloaded onto my desktop documents or downloads. Do you know of a way to do this?
TIA