1. You can take any image size, but they should be the same.
2. Thumbnail is generated automatically.
My question is that
We show original image in slider.
Unfortunately, Travelo theme has not option to change thumbnail image size.
We would like to use Image gallery style 1 in our image gallery page. Can we increase the size of the image and the thumbnail is automatically generated or not?
For your reference I share the url: http://dhamtrip1.dhamtrip.com/shortcodes/image-gallery-styles/