How to use:
{{subst:uw-preview}}
{{subst:uw-preview|{{{param1}}}}}
references a specific {{{param1}}}{{subst:uw-preview|{{{param1}}}|Additional text}}
adds text onto the end of the message instead of "Thank you"{{subst:uw-preview||Additional text}}
or {{subst:uw-preview|2=Additional text}}
also adds text onto the end of the message instead of "Thank you", but doesn't link a page as specified by the {{{param1}}}.
{{subst:uw-preview}}
rather than {{uw-preview}}
.1=
" if the article contains an equals sign and use "2=
" if the additional text contains an equals sign (such as a URL).