Once you have created and linked external (shared) sequence file, in case you want to put it into the graph, you need to convert it into internal sequence. In such a case you would see it in the graph itself.

You can internalize any linked external (shared) sequence file into internal sequence by right-clicking some of the external (shared) sequence items in the Outline pane and clicking Internalize sequence from the context menu.

You can even internalize multiple linked external (shared) sequence files at once. To do this, select the desired linked external (shared) sequence items in the Outline pane. You can select adjacent items when you press Shift and press the Down Cursor or the Up Cursor key. If you want to select non-adjacent items, use Ctrl+Click at each of the desired items instead.

After that, the linked external (shared) sequence items disappear from the Outline pane Sequences group, but, at the same location, the newly created internal sequence items appear.

However, the original external (shared) sequence files still remain to exist in the seq folder of the corresponding project what can be seen in the Navigator pane (sequence files have the .cfg extensions).