Remove Content Control

Hello! I’m trying to figure out a way to replicate a microsoft word feature on Libre office. We have a custom word document which uses values/dropdown selector. We normally remove this on Microsoft Office by selecting the page and click “Remove Content Control”, how would we replicate this on Libre office? The reason we’re trying to do this is because when ever we PDF without removing those fields, the fields show up as gray squares.

Follow up: It seems these boxes are in the “Edit Field” … “Items on list” and the reason they are show up incorrectly is because they use a custom font (GDT).

Are we able to use custom fonts in the Item List?