Upload a mockup to begin.
Then upload artwork, click layers, drag to move, and drag corner handles to resize.
Then upload artwork, click layers, drag to move, and drag corner handles to resize.
Preview/export match fixed
Mockup movable
Artwork movable
Resize on canvas
Best workflow: upload the mockup first, fit it to canvas, upload artwork, keep artwork blend mode on Multiply for garment printing, and export at the size you actually want.
Active layer: Mockup