Using cell groups in your drag-and-drop email allow more flexibility in the structure of a content sections by providing options to customizing a chosen cell group. Additionally, any customize cell group layout will be saved for future use.
1. Click 'Change Cell Group Layout'
2. Use 'Select Dimensions' drop down menu to select columns and rows
3. Click customize
4. Merge, delete or add additional rows to the layout
5. Click 'Ok' to insert.