Invisible elements such as scripts, comments, and named anchors are represented by markers in the Document window. Showing invisible elements lets you select these markers so that you can change the invisible elements' properties in the Property inspector. Scripts Displays an icon that marks the location of JavaScript or VBScript code in the body of the document. Select the icon to edit the script in the Property inspector or to link to an external script file.
Comments Displays an icon that marks the location of HTML comments.
Select the icon to see the comment in the Property inspector. This option is deselected by default. Embedded Styles Displays an icon showing the location of CSS styles embedded in the body of the document. If CSS styles are placed in the head of a document, they do not appear in the Document window. Anchor Points for Layers Displays an icon that marks the location of code defining a layer.