I would like to help.
But how large are your pictures? If small enough, you can just use MSpaint to perform that action. Otherwise you'll need some 3rd party softwares like
Adobe Photoshop to do this.
MSpaint can be visited following the below steps:
- Press Win+R to get Run...
- Just type in "mspaint" and press Enter
If you want more help, just reply here. i'll get back.
Kun Li
STO Application Support
Server and Tools Online Operations Team