How can you quickly toggle between model and layout spaces?

To quickly toggle between model and layout spaces in AutoCAD, clicking on the tabs at the bottom of the drawing area is the most direct method. Each tab represents either a model space, where the actual design work takes place, or one of the layout spaces, where the drawing can be prepared for printing or presentation. This visual interface allows users to instantly switch contexts without needing to navigate through menus or use complex commands.

Pressing function keys, like F5, does not provide the functionality specifically for toggling between these spaces. Instead, it may be associated with different commands or actions. The spacebar is primarily used for repeating the last command or accessing the command menu, and does not serve the purpose of switching spaces. Similarly, changing view settings is related to altering how elements are displayed rather than switching between model and layout spaces. Thus, clicking the tabs is the quickest and most efficient method in this scenario.