1. In a digital media environment to facilitate creation of content using one or more computing devices, a method comprising: generating, via a user interface for a digital media application, a document design including a layout of repeating design elements each comprising multiple objects of different content types grouped together; accessing content having a structured arrangement of data elements through a data panel exposed via the user interface; obtaining, via the user interface, a selection of a design element in the document design and a selection of a data element from the content in the data panel; responsive to obtaining the selections, parsing the content to recognize repeating data elements included within the structured arrangement of data elements corresponding to the selected data element; and auto-populating design elements in the layout of repeating design elements corresponding to the selected design element with content of the repeating data elements recognized as corresponding to content of the selected data element.