You seem to be mistaking how measurements work in computers.
When you scan an image into your computer, the image software you’re using (e.g. photoshop) will enable you to set the size of the image. It’s stored in the header of the file, including dimensions but also dots per inch. When you import the image into Easel, it honors the data in that header.
So, you need to look at your software to see what settings you’re using before you bring it to Easel.