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There are a lot of pages in my NIV bible that have historical information. So I decorate the edges.
This set of pages received medieval flourishes outlined in ballpoint pen and colored with prismacolor pencils. Since the background page color was yellow I had to stay with a complementary color.
Many times I outline very lightly in pencil first then go over that with pen. These were done in church during the sermons usually so I needed to remain very quiet and use something that was not messy. Pens & pencils worked very well.