Starting 1.17 from theme options you control if you wish the lists for agents, properties or blog posts to be on 3 columns or 4 columns.
From the same area you set the minim height for the card (agent card, property card or blog card):
Card height is useful when you create your own property unit and you wish add more or less elements than in default template = http://help.wpresidence.net/2016/09/08/property-unit-design-settings-beta-version/
From the same settings you control the internal padding of the card.
You control the card unit background color:
You also control the card exterior border size and color: