hi!
i use nivio with thumbnails within a sliding panel, including online page editor
i have the problem when i edit online and want to upload a JPG the thumbnails are gone after saving.
when i do the setup as you show in your videos, in html-editor add-ones nivio-slider the checkbox of using thumbnails is gray and not clickable.

please check:
www.bettinakrenosz.com/test/galerieTest.html

login: demo
pw: demo

thanx a lot!
regards
strmiska

Hello,
Nivo Slider Thumbnails are not supported when used as an addon inside the HTML Editor.

so how do i change a jpg online without deleting thumbnails after saving??

Unfortunately it is not possible to edit the styles of the nivo slider created OUTSIDE of the editor and containing thumbnails.