Add {{subst:Welcome}} ~~~~ to the user's talk page. It is suggested that you watch the talk page in case the user replies there.

Parameters:

• |heading=no – Suppress the automatic heading: {{subst:Welcome|heading=no}}
• |headtext=Heading text – Change the contents of the heading: {{subst:Welcome|headtext=Greetings!}}
• |border=Color – Adds a border in the specified color, along with a light shadow. |borderradius= can optionally be used to create rounded corners: {{subst:Welcome|border=DarkViolet|borderradius=15px}}
• |newuser=y – alternate text for users with zero contributions (such as accounts just made via ACC; you can also use {{subst:Welcome-newuser}}, which includes your signature). Equivalent to setting |art=newuser.
• |image=File:Filename.png – Adds an image to the message (no brackets needed). |imagecaption= can optionally be used to specify the caption: {{subst:Welcome|image=File:Chocolate chip cookies.jpg|imagecaption=Here, enjoy some cookies!}}. If you want to get really fancy, you can specify the image size or link here like this: {{subst:Welcome|imagecaption=400px{{!}}link{{=}}[[Article]]{{!}}Caption}}.
• |art=Article name – Article to which the user contributed positively (no brackets needed): {{subst:Welcome|art=Foobar}}.
  • This can be set to newuser to produce the same text as setting |newuser=y when using Twinkle: {{subst:Welcome|art=newuser}}
• |customstart= – Adds a custom message at the end of the first paragraph, replacing "I hope you like it here and decide to stay."
• |customend= – Adds a custom ending to replace "Happy editing!"

Shortcut: {{subst:Wel}} ~~~~

Use {{subst:Welcome-anon}} or {{subst:Thanks}} for anonymous (IP) editors.

{{subst:Welcome-autosign}} (or {{subst:wela}}) invokes this template but includes your signature.

• Wikipedia:Welcome templates
• {{Register}}