The four screenshots were taken on the mocked estate before the EDIT grid
marked derived columns apart from ordinary read-only ones. Re-taken against a
real SAS backend, so they show what ships: the fx badge, the tinted header and
cells, and the edge that opens the computed block.
The read-only sentence now says what the marking means, which is the one claim
the old images made ambiguously.
The feature post: why a computed column is not filterable in a single DATA
step, the view that makes it so, the MPE_DERIVED configuration, dependency
ordering by VAR_DEPS, and what the feature will not do. Three screenshots from
the EDIT screen - the grid, a filter on a character derived column, and a
filter on a numeric one.