Slideshow with lightbox

I cant find the mediabox button in my editor. I use the jce editor. What do I have to do?

you don't need the button editor for the slideshow
just enable the plugin system Mediabox CK, then as you can see now the image opens in the lightbox

You re right, now it works in the slideshow. Thanks! But how about a single picture? Like this one: XY

you can still use JCE mediabox for the other purpose, or if you want to use Mediabox CK, you can check the doc
www.joomlack.fr/en/joomla-extensions/mediabox-ck
www.joomlack.fr/en/documentation/mediabox-ck/

if you want to use the editor button, this is only in the Pro version

Thank you so much for your help! Now I have a last question. Everything works now. Is there an option to watch the slideshow in the lightbox if you click on it? So that you can click on the next picture while in the lightbox?

as said before

you can not link the whole slideshow, unless you wrap it into a link from the container (to do in your template or content)

else you can go in the slideshow options >> lightbox >> group in album >> then you can navigate through the image in the popup