Razer makes use of a very nice control panel that allows you to customize nearly every aspect of the DeathAdder. This is the main screen, which shows each of the five customizable buttons. This is also where you can make changes to the polling rate, dpi and configure each of your five profiles. Each profile is saved on your computer, so if you move the DeathAdder to a different computer, you will need to reconfigure settings to your liking. Also, if you make any changes to the polling rate, you will need to reboot your system for the changes to take effect. For those who do not want / like the blue LEDs on the DeathAdder, you can opt to disable both the scroll button and the logo light(s).
Here we see the expanded sensitivity settings tab. Here we can adjust the scroll speed, enable or disable universal scroll (clicking the middle mouse button and dragging the mouse will scroll in the direction of mouse movement), activate On-The-Fly sensitivity and adjust double-click speed. There is even a test area to try the double-click settings (the graphic makes a loud glass shattering sound when clicked; scared the heck out of me the first time!).
When you program On-The-Fly sensitivity to a button, simply press that button and move the scroll wheel up or down to activate the sensitivity meter and adjust it accordingly. The meter disappears once you release the button.
Next up we have the advanced settings tab. Here you can fine-tune the "X" and "Y" axis sensitivity independently, as well as adjust the Windows pointer speed (requires reboot) and configure acceleration levels.
One of my favorite features of this mouse is the ability to assign each button to accomplish almost any task. Simply click on the button you want to customize, and choose an option from the drop-down menu. Here you can see that I set the scroll wheel button to "F5" which I use to refresh web pages in Firefox. I also programmed buttons 4 and 5 to "next track" and "previous track" in Winamp.