The Vertical home defines the global vertical placement of objects cut with the blade cartridges, including V-Grooves. 

Adjust the Vertical home if the V-Groove is cutting too far up (as it sat on the board) when you are not cutting the outside of the mat. This is measured from the inside of the bevel to the edge of the mat.

This is viewed from the front of the mat. The V-Groove is cutting too far up, making the bottom border too big.

Decrease the Vertical home.

When making adjustments, click the plus or minus button at the end of the desired field about five times. Click OK and do another test cut. Check the results of the cut and continue making adjustments until the desired outcome is achieved.

Adjust the Vertical home if the V-Groove is cutting too far down (as it sat on the board) when you are not cutting the outside of the mat. This is measured from the inside of the bevel to the edge of the mat.

This is viewed from the front of the mat. The V-Groove is cutting too far down, making the bottom border too small. 

Increase the Vertical home.

When making adjustments, click the plus or minus button at the end of the desired field about five times. Click OK and do another test cut. Check the results of the cut and continue making adjustments until the desired outcome is achieved.

Alternatively, adjust the Vertical Home on the Troubleshooting Screen. Make sure that you only have a V-Groove on the screen.