elpa-pointback - 0.2-4 main

When you have two windows X and Y showing different sections of the
same buffer B, then switch to a different buffer in X, and then
show B in X again, the new point in X will be the same as in Y.
.
With pointback-mode (or global-pointback-mode), window points are
preserved instead, and point will be where it originally was in X for
B when you return to B.