By uisng imgen you can generate unique numbered images in a single command. It can be used to generate test images where you need to use many images but uniquely identifiable like testing sample product/items, testing different banners, placeholders, etc.
Usage of imgen:
-h int
Height of the image (default 200)
-w int
Width of the image (default 400)
-t string
Title of the image (default "test")
-n int
Number of images (default 5)