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
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: