A system (200) can include memory (208) to store computer executable instructions and a processing unit (210) to access the memory and execute the computer executable instructions. The computer executable instructions can include a capture tool (14, 206) to import content (24, 222) into a design document (26, 212) and to logically group the content into a logical group, corresponding to a container. Dynamic behavior can be assigned to the container, in response to a user input, to control a layout of content within the container and to provide a source complex document (12, 202) stored in the memory to retain the dynamic behavior for editable content in the container.