cd ..
copy /b Name-of-initial-image.jpg + Name-of-file-containing-text-you-want-to-hide.txt Resulting-image-name.jpg
TIP: To strengthen the encryption of your seed consider adding random and arbitrary characters. This could be done by replacing spaces with “-[random text]-”
Example: sdfsdf-iuocbff-oiurwqx-afewef-gupioue …
The true encrypted text would be sdfsdf, oiurwqx, gupioue with -iuocbff-, -afewef- representing spaces.