That's a default layout of Joomla itself. If you want to change that layout you would need to create a custom com_contact override. Overrides are a feature of Joomla that allows you to create your own layout, but we highly recommend that people don't use them. Once you create an override that means no updates will happen to those layouts and it may break backwards compatibility with Joomla. That is why we never use them with our templates. It is also a considerable amount of custom coding to modify the layout files how you want, and we do not provide services to do this as part of our support.
Here is some basic information on Joomla overrides:https://docs.joomla.org/How_to_override_the_output_from_the_Joomla