started a project and saved it as tsp. thought i was supposed to see what i had done when i reopened the image as a tsp in studio, but the only thing that shows is a box that says custom and a value of 1. there doesnt seem to be any history files at all- so i still have to guess at what i did to achieve a particular effect.
When you open your TSP image, think of it as a project containing unfinished work or finished work before you output, it will still show the original image plus adjustments used. If you Apply before saving as a project image then what you will get is the result of the Apply function which is a new image. If you use an external plugin and save that you will just get the same as using Apply.
When TSP, Project files, are reopened you get the Original + Adjustments appearing like this: