Here’s how to rotate / resize image with a right click in Linux Mint:
1. Issue the following command at the terminal-
sudo apt-get install nautilus-image-converter
2. The rotate / resize options will now appear in the context menu for images in the nautilus file browser. To rotate an image, right click an image in nautilus and select ‘Rotate Images…’.
3. To resize an image, right click an image in nautilus and select ‘Resize Images…’.
4. Select a new image size from one of the 3 available options (predefined size, scale or custom size) and click ‘Resize’.