Global +90 degree rotation of all images in a folder

[topdude]

Global +90 degree rotation of all images in a folder - how can I do this, so the contact sheet will have a vertical version of each and every image?

I tried to look around the options, I can not find a reference to this.

Thanks

[xnview]

Global +90 degree rotation of all images in a folder - how can I do this, so the contact sheet will have a vertical version of each and every image?

I tried to look around the options, I can not find a reference to this.

If you want to make a global 90° rotation on jpeg files, you can use lossless rotation