Navigating the timeline is easy. You can scroll using your mouse wheel or the arrow keys on your keyboard to move in any direction.
If you want to see more of your timeline but certain elements are off-screen you can zoom out using the - button. Alternatively, if you want to only see certain elements you can zoom in using the + button. These buttons are located at the bottom right of your screen and can be seen in the image above.
Tip: holding down the space bar on your keyboard and holding left click on your mouse will allow you to pan freely around your timeline content.