I always have to make a lot of alterations to any pattern I use. I’ve never been satisfied with any of the solutions for what to use when making them. Over the years I’ve heard a lot of ideas: tissue wrapping paper, and old patterns are a couple of them. However, the paper available for wrapping is stiffer than the paper commercial pattern-makers use which created problems when I tried to fold the pattern back up, and old patterns never worked for me because: 1. I never get rid of old patterns, and 2. they have markings all over them which could cause confusion when I went to cut-out and mark my pieces. I have FINALLY found a solution which works great for me.
I realized that pattern-makers use a lot of excess paper when they print. So when I cut out the pieces of a new pattern, instead of throwing away tons of pattern tissue with no markings on it at all; I keep a large plastic grocery bag where I put all that left over tissue paper. When I need to make alterations, I simply find a piece that is closest in size to what I need and tape or “glue stick” it in.