<\body> In order to start writing a laptop presentation, you should first select the style using . There are several main ``themes'' for presentations, such as , , , , , which can be selected from the menu. The presentation style includes the style package, which features the use of colors for mathematical formulas, enunciations, etc. Additional customizations of the presentation style are available in the menus for the various tags to which they apply. For instance, the rendering of slide titles and theorems can be further customized. <\initial> <\collection>