Visual GUI builders assist in the design process by:

1. Drag-and-drop interface: Allowing designers to create GUI layouts by dragging and dropping elements.

2. WYSIWYG (What You See Is What You Get) editing: Providing a real-time preview of the GUI.

3. Pre-built components: Offering pre-designed UI elements, such as buttons, text fields, and menus.

4. Property editors: Enabling designers to customize component properties, like colors, fonts, and sizes.

5. Layout management: Helping designers arrange elements using grids, anchors, or other layout tools.

6. Real-time feedback: Showing immediate results of design changes.

7. Reduced coding: Minimizing the need for manual coding, making design more accessible to non-coders.

8. Collaboration: Facilitating teamwork by allowing multiple designers to work on the same project.

9. Version control: Tracking changes and revisions to the design.

10. Exporting and integration: Allowing designers to export the design and integrate it with code.

Visual GUI builders streamline the design process, making it faster, more intuitive, and accessible to a broader range of designers and developers.