All 3D charts are pivoted in 3 planes about the far corner (where the XYZ axes meet). You can set the viewpoint as a 3-vector of [Roll, Pitch,Yaw] values about this point, but the values (coupled with the perspective distortion) interact in quite a strange way and it takes a while to get comfortable with the settings.

      ch.Query 'VI'
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... is a good starting point. Values from 0–90 are acceptable as rotations in degrees. You cannot turn charts completely around or upside-down!