Board Thread:New on Gravity Falls Wiki/@comment-39246475-20190424131144/@comment-29800214-20190428094943

Take what you want to encypt, then find the first letter of it (say it's F). Find this on either the top line or the line on the left (with ABCDEFG, etc). Then take the first letter of your password, and find it on the other "side" (say it's M). It'll look like this: