Use the <guilabel> and </guilabel> tags as a default for GUI descriptions, like a screen name or screen title. For example:

The <guilabel>Authentication Configuration</guilabel> screen 
shows you how to make your system more secure.

The output:

The Authentication Configuration screen shows you how to make your system more secure.

Use the <guibutton> and </guibutton> tags to denote a button on a screen or menu. For example:

Check the <guibutton>Activate on boot</guibutton> button 
to have the X Window System start automatically.

The output:

Check the Activate on boot button to have the X Window System start automatically.

The <guiicon> and </guiicon> tags are used to denote a panel or desktop icon. For example:

Double-click the <guiicon>Start Here</guiicon> icon on the desktop.

The output:

Double-click the Start Here icon on the desktop.

To note a menu (like in the installation program or within the control panel), use the <guimenu> and </guimenu> tags.

To note submenu items, use the <guimenuitem> and </guimenuitem> tags. (Please note that there should not be any breaks between these commands, but for printing purposes breaks have been inserted). For example:

Select 
<guimenu>Main Menu</guimenu> =>
	    <guimenuitem>Programming</guimenuitem> => <guimenuitem>Emacs</guimenuitem> to start the 
<application>Emacs</application> text editor.

The output:

From the control panel, click on Main Menu => Programming => Emacs to start the Emacs text editor.