Welcome to the forum! There are a couple posts going on the new webmail changes with a couple people mentioning it's slower. One thing I suggest is Firefox and AdBlock. That should get rid of the ad which might be slowing down the page. Also, have you tried deleting temporary files for the page? Last, many people find it useful to change the UI to list mode by click on the gear > All Settings > Layout > List. That is also where the option is to enable check boxes.
Right! I have to refresh my page in order to get more emails. There used to be a little gear I could hit, and it would log out after so much time. Now it just stays logged in but no new emails arrive unless you refresh the page
I agree. I was trying to delete a number of emails in the trash folder and couldn't figure out how to do it. Shift didn't work like it used to. I tried cntl but that made the size of all the emails smaller. Logged out and logged back in and still smaller. How do I correct this? And how do I delete a number of emails in trash???
You probably pressed CTRL and used the scroll wheel to zoom in. Use it again to zoom out. Or depending on your browser, there should be a magnifying glass on the top right of the screen you can click on and then click on reset.
As for selecting multiple emails, did you try the suggestion CurtB posted?