Idea: add a customizable "stamp"
As a writer, I am finding Index Cards to be an invaluable tool!
I noticed that on my last pass through my outline, I had color-coded cards with ideas for new scenes. When I finished writing and inserting this scene, I wrote "Done" in ink. But it occurred to me that if I had a "stamp" that I customized to say "DONE" in bold but translucent letters across the face of the card, it would be a simple button click.