BTW My favorite free picture program is Irfanview. it is a free download and easy to use. I used it for all of my EBOOK pics and all of my tutorials etc. I use it all the time to change pictures in size and to work with the pics in any way i need. I highly recommend it. I've used it A LOT over the last 8 years.
If you want to download it and have questions just let me know and I"ll help if I can.
I use paint for some things but Irfanview is much easier to use for changing the size of pictures.