Choosing custom packaging size, without having to uncheck it every time

When shipping items from my shop, I often have to choose custom sized packaging. Every time I open the packaging size option, the SAVE box is checked and I have to uncheck it, sometimes 10 or 12 times a day.

Is there a way to uncheck that box, so that I only have to deal with it when I DO want to save a package?

It really is sucking extra time from my day having to uncheck that box that I don’t want.