If you got a small screen like an Eeepc or other netbooks, you might want to Zoom-in so you could read the texts you're reading.
The first thing to do is enable Compiz:
1.Right-click on the desktop, then Change Desktop Background->Desktop Effects, and set it to Extra Effects.
2.Install Compiz Config Settings Manager via Add/Remove... in Applications.
3.After you have it installed, open it and check Enhanced Zoom Desktop in Accessibility.
To Zoom In:
1.Press the Winkey and hold, while you use the scroll wheel to zoom-in and out.