Belkin F1DN104K-3 Configuration Manual page 14

Section 2 - Configuration
Example 3 - The setup in figure 10 below is illegal. There is no
interface between the two displays hence the curser will not move.
It is recommended to use the setup in figure 11 below instead which
will give similar positions but will work.
Figure 10 – Legal corner to corner setup
Figure 9 – Illegal setup. The mouse cursor would not cross the corner
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