The following buttons toggle between on/off states for their relevant properties.

They may be applied to a selection of marked text, or to text that will follow from the cursor position where the button was toggled.

Button icon	Name	Description
	Bold	Toggles between bold text and normal text
	Italic	Toggles between italic text and normal text
	Underline	Toggles between underlined text and normal text

Examples :

Before	Action	After
abc def ghi	select "def", click on	abc def ghi
abc def ghi	put the cursor after "ghi", click on , then , and type "jkl"	abc def ghi jkl
abc def ghi jkl	select "def", click on	abc def ghi jkl