You know how you can bookmark pages, well is there a way to un-bookmark a page/chapter?

Go to bookmark and press the X

Do you see the three lines above? Press that the book mark and you will see X

Won't all the bookmarks just disappear if you do that?

Yeah they will I was wondering if there was a way to delete some but not all but I guess there isnt lol. Anyway thx everyone who replied!