If a site you have been browsing suddenly appears magnified, the way to get back to normal is this. Click on the three vertical dots in upper right, select All Settings and then Websites/Display/Page zoom/Manage exceptions. Make sure the zoom is set at 100% and delete the oddball website from the Manage exceptions list, where it is set at a much higher zoom, possibly 500%.
Hi
you had some problems with zoom?
btw. you can use the magnifier icon in the omnibox which is displayed when a website is zoomed. This is one of the new features we have added to the latest version.