To enlarge text for all webpages:
Choose Safari > Preferences.
Click Advanced.
Select the checkbox to never use fonts smaller than the selected size.
Choose a font size from the pop-up menu.
If you have difficulty seeing, you can make text on webpages bigger and easier to read.
To enlarge the text in the current Safari window, choose View > Make Text Bigger.
Choose Safari > Preferences.
Click Advanced.
Select the checkbox to never use fonts smaller than the selected size.
Choose a font size from the pop-up menu.
Some webpages may not look correct if you select this option. This setting does not affect the size of text in images.