Where to adjust presets for slider options “auto rotate” (3, 5, 10, 15 seconds)? [closed]

In anybody needs this in the future I found a quick and easy workaround: you could just adjust the slider interval in the shortcode.

First you have to switch to the “classic mode” (turn the Visual Composer off) and then find the shortcode that defines the interval:

[vc_gallery interval="10" images="22390,23006" img_size="full"] 

You can then set the interval to whatever you like – for example 7 seconds:

[vc_gallery interval="7" images="22390,23006" img_size="full"]