# Design Tools - [Undo, Redo, and History](https://docs.beefree.io/end-user-guide/design-tools/undo-redo-and-history.md) - [Mobile Optimization Options](https://docs.beefree.io/end-user-guide/design-tools/mobile-optimization-options.md) - [Mobile Design Mode](https://docs.beefree.io/end-user-guide/design-tools/mobile-design-mode.md) - [Configuring Settings](https://docs.beefree.io/end-user-guide/design-tools/configuring-settings.md) - [Borders](https://docs.beefree.io/end-user-guide/design-tools/borders.md) - [Padding](https://docs.beefree.io/end-user-guide/design-tools/padding.md) - [Hover Effect for Buttons](https://docs.beefree.io/end-user-guide/design-tools/hover-effect-for-buttons.md): Hover Effect for Buttons is available for Email, Page, and Popup builders. - [Content Area Padding](https://docs.beefree.io/end-user-guide/design-tools/content-area-padding.md) - [Line Height](https://docs.beefree.io/end-user-guide/design-tools/line-height.md) - [HTML Importer](https://docs.beefree.io/end-user-guide/design-tools/html-importer.md): Learn more about importing your existing HTML designs into the Email Builder. - [Add Custom Head HTML](https://docs.beefree.io/end-user-guide/design-tools/add-custom-head-html.md): Learn more about how to apply custom HTML to the head tags of your code. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.beefree.io/end-user-guide/design-tools.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.