Thanks for writing in! Please edit your slider and make sure that the slider layout is set to fullwidth. However, setting the height would need a custom JS code. Regretfully there isn’t any feature offered in X to do that by default. It could be possible with custom development, but this would be outside the scope of support we can offer.
For the meantime, in the row settings please enable the marginless columns. In the column settings container the text, you can insert an inline css vertical-align: middle; This will make sure that all the contents in the column will be positioned at the middle. You can also check out this video to know more how to make a fully responsive slider: