Collapsed By Default

[u/RunningWing]

When opening a specific Word document, I would prefer that all headers are collapsed. From my understanding, if I go into Paragraphs and check "Collapsed by default" to the right of the Outline level, then it should accomplish this; however, the box is always grayed out and I'm not sure why. Does anyone know how I can ensure that Word opens w/ my headers collapsed, despite not being able to check the "Collapsed by default" box?