MatiMz

That solved it. It’s not a new extension but they must have made a code change that adversely affected multisim. I disabled it and it works. Thanks!

I've created a few circuits already and had no trouble, but tonight when I clicked to create a new circuit, the display was messed up. There's a big grey box (highlighted in red on the screenshot) that is pushing the important stuff (like the circuit sketch) down to the bottom of the window. I'm on a Mac, using Google Chrome. Chrome is fully updated. I'm on Multisim live with a "standard" subscription.