Placeholder
Placeholder[name]
represents a placeholder labeled with name that indicates a place to type.
gives the empty placeholder .
Examples
Wolfram Research (2008), Placeholder, Wolfram Language function, https://reference.wolfram.com/language/ref/Placeholder.html.
Text
Wolfram Research (2008), Placeholder, Wolfram Language function, https://reference.wolfram.com/language/ref/Placeholder.html.
CMS
Wolfram Language. 2008. "Placeholder." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Placeholder.html.
APA
Wolfram Language. (2008). Placeholder. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Placeholder.html