With the new Target URL feature, you now have the freedom to add a desired URL that may differ from the ranking URL. This means you can monitor the position of your keywords for a specific page, even if it's not the same page where the keyword is currently ranking. The cannibalization icon 🐞 will now also tell you when the you are not ranking for your desired URL. 

 
In the current iteration you can set up the Target URL only from the keyword detail page. In the keywords table, click on the keyword and you will find the target URL at the top. If you are already ranking for a URL, you can also set it as Target URL with one click.