Lynda, typically, when you resize, the checkbox for Lock aspect ratio is checked by default. If you size UP using PSP2021, it will use the AI-powered mode but then, it does not show the Lock aspect ratio. So, to check it, change the AI-powered setting to something else (like Bicubic), so you could see whether that box is checked or not. Once it is checked, you can go back to the AI-powered option, and select the thickness you want for the ribbon (then the length would automatically adjust).
