Zenity allows some markup like <b>, <i> or <span>. This is actually a Pango Markup . Thus, large text can be achieved using a range that has a font or size attribute:
For instance:
zenity --info --text '<span foreground="blue" font="32">Some\nbig text</span>\n\n<i>(it is also blue)</i>'
Note that font = "32" is another way to write size = "32768" , since the size is at 1024 points. font = "32" is a partial description of the font, containing only the size. See the documentation page.
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