At times for some purpose we try to find out if a custom field created is a KUT field or created from back end cloud studio.
We tend to login cloud studio & navigate to corresponding BO extension & check if a BO is extended with custom field.
Hold on there is another way to find it without logging to cloud studio.
Open the UI where our custom field is added in debug Mode, simply add debugMode=true in URL as shown below.
Click on Ctrl+left key to open debugger.
Once debugger is open go to ComponentModelXML tab (be patient it takes time to load).
Search for your custom field name in ComponentModelXML & Once you find your field, just look for attribute extended by of HTML near your custom field. If extended by contains CustomerExtension followed by your field name then its a KUT field as shown below.
If extended by attribute contains your solution name then it is a SDK field as shown below.