Version 1.1 adds flexible reference-corner selection. The reviewer can: 1. Select Raise to use the highest corner as the reference. 2. Select Lower to use the lowest corner as the reference. 3. Tap any displayed corner to use it as a custom reference. 4. Observe that positive values indicate corners to raise and negative values indicate corners to lower. No account, login, external service or sample file is required. Place the device on a stable surface, calibrate it, enter the base dimensions and then tilt the device slightly to observe the adjustment calculations.