How to decrease the slider height ?

Dear,

I try to change the height of slider on https://www.beart.fr/ to 300px

From TD composer the bloc id it is td_bloc_slide, this component do not own a height settings.
So I try to add an extra css class: slidershow


.slidershow {
height: 300px !important;
}


While the component get the expected height the title disapeared !

Thanks for your help

update css code

.slidershow, .td-theme-slider,.td_module_slide .td_block_inner{
height: 300px !important;
}
.td_module_slide {
height: 300px !important;
}

Ok finally found the right settings without to use css named image height from the tag div composer