How to make map smaller without making the site smaller?

Ok so one thing i dont like is having big maps and i either A. have to continue to scroll around all the time seeing where to go or B. ctrl+ mouse wheel to make the map and site smaller and sometimes its a big area so i can't legibly read chat. Is there any way where i can just make the map smaller for myself? I am not the DM not sure if there is anything they can do to fix that problem.

ALT+mouse wheel will zoom just the map, leaving the rest of the web page alone.

Alt+ mouse wheel zooms roll20, ctrl+ mouse wheel zooms the browser, and in turn the chat window. edit: thats what I get for walking away mid post lol.

On the left hand side of the map is a toolbar with a zoom tool. Additionally, as Khrain pointed out, you can alt+mouse wheel zoom.  - Gauss

Thanks everyone. Ill try that out tonight

Is there any way to make the zoom stay centered on the mouse pointer? I always end up in the upper left corner of the map and have to pan around a lot.