In MCS one can create their own customized or edit an existing tile through the GUI as well as APIs. Tile types are also called Box Types. Please refer to the existing tiles in MCM that are also available in MCS.
To APIs related to tile editor please refer to https://tag.atlassian.net/wiki/spaces/UPGRADES/pages/502333441/v5.0+Tile+Editor. To create a tile on the MCS-GUI please follow the steps below.
Navigate to Tiles from the home page.
By default the 4A Standard types are displayed.