Editing Forum:Making user subpages

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This might be a question with an obvious answer but I'm not sure how to create an user subpage like [[User:Disaster_Flare/Fighter_Movie_Appearances|this one]]. How can one be created? I want to put my own Smash Ultimate CSS on it using stock icons like {{head|Mario|g=SSBU|s=24px}}

[[User:Gligar2007|Gligar2007]] ([[User talk:Gligar2007|talk]]) 00:48, April 23, 2021 (EDT)
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	[[User:Gligar2007\|Gligar2007]] ([[User talk:Gligar2007\|talk]]) 00:48, April 23, 2021 (EDT)		[[User:Gligar2007\|Gligar2007]] ([[User talk:Gligar2007\|talk]]) 00:48, April 23, 2021 (EDT)
	:User:Gligar2007/(title of subpage). DF used the DISPLAYTITLE template to omit the stuff before the slash. [[User:Cookies and Creme\|<span style="font-family: Georgia;color: black;">Cookies</span>]][[File:CnC Signature.png\|20px]][[User talk:Cookies and Creme\|<span style="font-family: Georgia; color: black;">Creme</span>]] 01:01, April 23, 2021 (EDT)
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