The visible Kikuchi pattern is a gnomonic projection of a spherical signal. For several reasons it is practically always beneficial to change the projection direction. This is equivalent to a rotation of the signal around the projection center.
For example, the images below show the already rotated signal of a dynamical simulation (digital twin) of anhydite (CaSO4) as stereographic projection (left). Next to it is the resulting gnomonic projection of the signal for the applied rotation and the fixed PC, while on the right is shown the reciprocal lattice derived from the Kikuchi pattern thus generated. All these representations, including the Funk transformation not shown here, are freely rotatable by moving the mouse while holding down the left mouse button (LMB).
Please note: The commonly loaded pattern, however, is not rotatable as gnomonic projection!
Rotations around fixed axes
On the other hand, when inspecting the lattice a little more closely, it is often desirable not only to be able to rotate freely, but also to be able to create specific projections of the lattice or the diffraction signal. To this end, different options are available.
For rotation around the screen normal (Z): use the mouse wheel (MW).
For rotations around the horizontal (X): use Shift+MW.
For rotations around the vertical (Y): use Ctrl+MW