The last selected tab in which you performed a
modification and a validation using the OK button is saved
in settings.
That means that this tab will be displayed next time you will launch
the Boundary Simplifications command.
Select a green-highlighted hole.
It is turned blue and will then be ignored by the
mesher.
Select a blue-highlighted hole.
It is reactivated and will be taken into account by
the mesher.
The Boundary Simplifications dialog box is updated in
accordance with the holes you selected or de-selected:
Click OK.
Click Mesh The Part
in the Execution toolbar.
The meshed part now appears with ignored and
non-ignored holes.