The {url} Keyword

The {url} is a brand new keyword which can be used in the designer to indicate the local web-site url, instead of having to write the whole SharePoint site/sub-site path.

Important Note: 

The {url} keyword can be used to substitute the full site/sub-site url when creating lookup controls or list queries. 

Up to this point, when you had to create a new List Query using PowerForm's designer, you had to enter the full path to the Site Url property. E.g. 

Using the new {url} keyword, you can now accomplish the same thing with less effort. E.g.