XnView Software

I wanted to put together a slide show by viewing the pictures either in the picture window or fullscreen mode, and decide there which picture should go into the show and which not. The file tagging function, which is available in Browser mode, would come in very handy if it were available in the picture window or in full screen mode. Something like a function key that I can press to tag or untag an image. Or an item in the picture context menu.
Is there something else that I could use, to put a slide show with selected images together under the described circumstances? Something that I missed to notice?

Control-T in fullscreen does it. To see the tagging status in fullscreen, hit I to show information.

Thanks. That's exactly, what I was looking for.