XS_OMIT_MARKS_OF_PARTS_OUT_OF_VIEW_PLANE_LIMIT_ANGLE
Category in Advanced options dialog box: Marking - general
Use this advanced option to hide
the part marks for parts outside the current view plane by defining the limit for
inclusion as an angle. The default value is 20.0
.
You also need to set the Parts out of view plane option in the view level part mark properties to Not visible to hide parts from the views that are outside the angle you specify here.
This advanced option is model specific and the setting is saved in the options database.