I do not have photoshop and would like to upload some tshirts but cannot work out how to do it. I have followed all the instructions, created the correct size file, png, rgb, with transparent background but they are not being accepted. It tells me to see error message but there doesn’t appear to be one. I have created these files in Gimp…………..any help would be appreciated and maybe some simple step by step instructions if anyone has the time, please!
Thank you in anticipation………….