Icon view: Move the Icon size slider to the right. Zoom in or out on your current page Make everything larger: Windows and Linux: Press Ctrl and +.
The view you’re using determines how you increase the size. This page shows you how to change text size, text and background colors, and other display settings through your browser. Increase the size of icons and text in the Finder: Select an item in the Finder, then choose View > Show View Options. It's not as nice as safari (has some quirks), but if your eyesight is letting you not read safari too easily, I'd say it's worth it. Click the Text size pop-up menu, then choose a text size. , and then you can select which key to use. In that panel there will be a setting that says, Zoom using scroll wheel while holding.
If you're open to trying new browsers, Mercury lets you set a font size in its settings and it saves it until you change it. On Mac OS X 10.6.x, follow these steps to set this preference: Click the Apple icon in the menu bar. Oh, btw, if you reload the page or click the next or back page, it's back to small. It's a PITA and its ridiculous you can't just adjust font size, but that's the sandbox we live in! You can keep going bigger by clicking the bookmark again. You can however zoom the entire user interface in and out from the View. Now, for only the current page you are viewing, go to bookmarks and click your zoom bookmark. Currently it is not possible to change the font family or size outside the editor. copy and paste it as a new bookmark named zoom. Not a true adjustment but unfortunately this is all you can do in safari.