6. Open your first image and decide how you will digitise it.
You can need to make three separate changes to the same original image and save each change as follows:
6.1 Save it as the filename1_1.jpg. (1st change).
The second digitised image of the same original as the filename1_2.jpg (2nd change).
The third digitised image of the same original as the filename1_3.jpg (3rd change).
6.2.
When all 20 images have been done, re-open them and resize them to 200px wide and save as the image filename, but with an 's' on the end , so to avoid overwriting the original 1280px image.
The thumbnail filename1_1.jpg would be saved filename1_1s.jpg .
This way you keep the original image and thumbnail image, as well as the re-digitised image.