[Plugin: NextGEN Gallery] slideshow customization ?

hello there !

I hope you could help me

I’d like to change the navigation bar which appear on pictures on the slideshow mode

indeed I want to display the description/caption of the picture only and not the buttons (arrays, number of picts, fullscreen)

actually I would like to have the example showed there : https://nextgen.boelinger.com/slideshow/

so i guess the design depends of the JW image rotator https://www.longtailvideo.com/players/jw-image-rotator/

so how could I change this ?

many thanks