> For the complete documentation index, see [llms.txt](https://docs.emaildelivery.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.emaildelivery.com/docs/what-to-know-before-using-the-email-marketing-platform/you-can-personalize-on-all-properties-and-in-urls.md).

# You can personalize on all properties and in URLs

You can personalize anywhere and with any property by specifying the property name like this:

{{City,default=Your city}}

default= is an entirely optional fallback for contacts missing that data, you can also just do {{City}}. 

If you specify the property in the URL of your email template, contact properties will be filled in for tracking on your website.