Saving designs made on design tool

Hi, Newbie here, as well as my own uploads i was playing with the custom tool and made some quite nice slogans, i wondered is there a way to save that as a design and add to the portfolio?.
i can see a get price " slightly expensive although handy" and wodered if there is a way to use the tool to design wording and save as a design to go on the shirts?

There isn’t. You need to create the text design in a design program before-hand. For example with Gimp: https://www.spreadshirt.com/blog/2019/02/11/spreadshop-tools-gimp/