+The above commands do not depend on the location of the cursor.
+If the customizable variable @code{calc-context-sensitive-enter} is
+non-@code{nil} (@pxref{Customizing Calc}), these commands will become
+context sensitive. For example, instead of duplicating the top of the stack,
+@key{RET} will copy the element at the cursor to the top of the
+stack. With a positive numeric prefix, a copy of the element at the
+cursor and the appropriate number of preceding elements will be placed
+at the top of the stack. A negative prefix will still duplicate the
+specified element of the stack regardless of the cursor position.
+Similarly, @key{DEL} will remove the corresponding elements from the
+stack.
+