For Insert slider gallery, please download and activate this plugin – https://wordpress.org/plugins/image-slider-slideshow/
After it please see this video for documentation
Boxed Slider
[img-slider id=”3066″]
Caption Slider
[img-slider id=”3075″]
Carousel Slider
[img-slider id=”3078″]
Content Slider
[img-slider id=”3079″]
Effect-Coverflow Slider
[img-slider id=”3085″]
Full-Width Slider
[img-slider id=”3089″]
Owl Slider
[img-slider id=”3088″]
Pagination Slider
[img-slider id=”3087″]
Thumbnail Slider
[img-slider id=”3086″]