Multiselection
is an option to ListPicker that specifies whether multiple values may be selected.
Examples
Wolfram Research (2012), Multiselection, Wolfram Language function, https://reference.wolfram.com/language/ref/Multiselection.html.
Text
Wolfram Research (2012), Multiselection, Wolfram Language function, https://reference.wolfram.com/language/ref/Multiselection.html.
CMS
Wolfram Language. 2012. "Multiselection." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Multiselection.html.
APA
Wolfram Language. (2012). Multiselection. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Multiselection.html