The context menu allows you to hide/show a modification
feature.
If a modification feature is put in no show, all features absorbed by this
feature are in no show too.
Right-click the element (Split.1) to be hidden from the
tree or the geometry, and select
Hide/Show from the
context menu.
As Extrude.1 is absorbed by Split.1, Extrude.1 is also put in no
show.