Kramer 4 x 4 Seamless AV Matrix Switcher/Multi-Scaler - Manual (Page 21)

14 VSM-4x4A – Connecting and Operating the VSM-4x4A
5.2.3 Bezel Correction
Set bezel correction via the OUTPUT menu (see Section 6.2.1 ) to make up for the
rims around the displays used for creating the video wall, thus creating one smooth
picture. In the example in Figure 7 the top photo shows the video wall before bezel
correction and the lower photo shows the corrected image on the video wall.
Figure 7: VSM-4x4A Bezel Correction