Most browsers, including Internet Explorer, Chrome, Firefox and
Safari have a Zoom feature. The Zoom feature allows you to
increase or decrease the size of a web page in order to improve
readability or viewing experience.

Increasing webpage size.
To zoom in, press and hold (Ctrl) while pressing (+).

Reducing webpage size.
To zoom out, press and hold (Ctrl) while pressing (-).

Reset webpage size.
To go back to default, press and hold (Ctrl) while pressing (0).

Apple Mac users.
As above but use the Apple/squiggle key instead of (Ctrl).