Clarify docs of .slice_collapse()
@@ -450,6 +450,14 @@ where
/// Slice the array in place without changing the number of dimensions.
///
+ /// In particular, if an axis is sliced with an index, the axis is
+ /// collapsed, as in [`.collapse_axis()`], rather than removed, as in
+ /// [`.slice_move()`] or [`.index_axis_move()`].
+ ///
+ /// [`.collapse_axis()`]: #method.collapse_axis
+ /// [`.slice_move()`]: #method.slice_move
+ /// [`.index_axis_move()`]: #method.index_axis_move
+ ///
/// See [*Slicing*](#slicing) for full documentation.
/// See also [`s!`], [`SliceArg`], and [`SliceInfo`](crate::SliceInfo).
///
