What are design themes used for in document creation?

Design themes in document creation serve the primary purpose of applying consistent styles across a document. This uniformity enhances visual appeal and ensures that the document communicates its message effectively to different audiences. By using design themes, elements such as colors, fonts, and overall layout can be standardized, which helps maintain a professional look and feel throughout the document. This is particularly useful when creating materials intended for various audiences, as it allows for quick adjustments while still aligning with the organization or branding guidelines.

The other options, while related to document editing, do not capture the essence of what design themes specifically provide. Editing images pertains to graphic design rather than overall document style. Formatting tables involves layout and organization of data specifics rather than broad themes. Adjusting margins concerns the physical spacing within the document, which is distinct from the overarching style that themes dictate.