Modifying layer css codes

Sometimes you want to change the css code of the layer, not the item, where you can add css classes, and it's not that easy to make a css rule, that only affects one specific layer. You should check your slider's id, like here, and use that to make a stronger css rule, than ours for your specific layers with a code like this:

body div#nextend-smart-slider-3 .smart-slider-canvas:nth-child(4) .smart-slider-layer:nth-child(2){
/*css codes*/

where the slider's id is 3, and the canvas means slide, so this rule will apply to the 4th slide, 2nd layer.