You're welcome..... And
It's adjusting the applications zoom control (you can also use the Ctrl Key + The Mouse Wheel and if available the application slider usually found in the bottom right corner) and it doesn't just apply to just "websites", many applications, like most of the Office Suite (word docs, excel spreadsheets, an email in Outlook), have this function built into it as a feature. I suspect to make things easier for old folks like me.