I also use PAINT or a couple more of available photo editing programs already included on the OS... MICROSOFT OFFICE PICTURE MANAGER comes to mind and works better with more edit options than the OFFICE PAINT program has ...
If you use right mouse click 'OPEN WITH' on a selected photo file on your system you will see a list of available photo editor programs already on your operating system.
RV NET does it best by having a SIZE entry form blank to type in what size you want the photo to be. We just add the HEIGHT entry form info and the WIDTH size is automatic depending what the height was adjusted too..
Only the small sizes used here are for putting images into the signature file...
Just remember to SAVE your REDUCED SIZE PHOTO with a new name and replace the original photo. You can't make a small photo large again without losing picture quality once you do this... I just add a -1 etc to the filename...
Roy Ken