If you have downloaded Google Chrome 9, then you will see some additional settings options available to you You can change the fonts and also the default zoom level.
To do so, type about:flags in the address bar and hit Enter.
Here, navigate to the second item ‘Tabbed Settings‘ and click Enabled.
Scroll down and click on Restart.
This will restart you Chrome browser.
Now click open the Settings Menu (spanner icon) and select Options.
Click Under the Hood. Here under Web Content, you will see the options to changePage zoom and customize fonts.
Do note that you may be able to access these settings only in the latest Google Chrome 9 Beta / Dev builds, Google Chrome 10 Canary builds, or Chromium builds.