Two Times
If the Window taskbar is not set on Auto hide, two clocks will be visible one on top of another while Opera is open. you can turn Opera's time display off by clicking on View > Stats Bar > Show Time.

Auto Fill
Opera allows you to fill up standard information such as your name, address, phone number, email address, etc. without having to type it every time. Open File > Preferences > Personal Information and fill out all the details. To enter the information into a text box on a Web page, right click the text box and from choose the text that you want to input.

Eye Tonic
Reading though poorly designed web pages can be a strain. Opera can switch between the Web page's color scheme and your custom settings. you can change your personal color scheme by clicking on File > Preferences > Documents. To switch appearance, click on the Toggle document setting button next to the address bar.

Homing in
You can put up your favorite site as the home page for your browser. click on Navigation > Set home page and enter the URL in Global Home Page field. is the page you want as homepage is already open, you can click on the Use active button to automatically insert its URL.

Friendly view
Opera has a built in zoom feature to help view Web pages more easily. The zoom percentage can be changed from the lower right corner of the mail window - click on the dropdown that displays 100% and change it to any number between 20 and 1000. You can set a default zoom percentage from File > Preferences > Window > Default scaling.

Script Error
If you get error on Web pages of it they are displayed weirdly, it could be a scripting error. Since Opera uses Netscape features by default, it doesn't run JScrpt, but runs JavaScript instead. you can force Opera to behave as Internet Explorer to web sites. Open File > Preferences > Connections and choose Identify as MSIE 5.0 in Browser identification drop down menu

Cache
Increase Opera's disk cache to store more pages that you can access offline. Opera by default sets only 2MB of disk pace for cache. To change this, open File > Preferences > History and Cache. Change the settings under Disk Cache.

Resume Downloads
Opera can be used to resume broken downloads. Open Window > Special Window > Transfer to open the list. To resume a download, right-click on the file and click on Resume Transfer to resume the download or Transfer Again to download the file all over again.

Configure Mail Links for Outlook
If nothing happens when you click a mailto: link on a Web page, the correct email client is probably not configured. Open File > preferences > E-mail and choose the correct mail client.