Screen has gone large

Hi not sure what has happened but when I open the page on my iMac the screen is really enlarged and I cannot see the whole page when manually entering.

I have looked to see if there is a size slider on the bottom of the tab like on other Internet pages but cannot find one.

Please can you advise how to make it go back to the normal size. I have tried logging off and on again but still the same. Thank you

Maybe you inadvertently used the ZOOM feature in your browser?

Thanks Alwyn sorted it now. thank you