Its able to be tilted forward and back so you can adjust for different heights for different bows. As you adjust the angle and height of the mounting bracket (part that bolts to the bow), you need to adjust the biscuit so it is straight up and down.

Also another thing to check is your centershot, the left and right position of the rest. To check and set this I usually nock and arrow and put it in the rest, then line the string up with the center of the riser and see if the arrow is pointing left or right of the string. If it is then adjust the rest so the arrow is lined up. This is your starting point and usually very close, from there you need to walkback tune to find and set your true centershot.

Hope this helps you out a little more.