Using Keyword Replacements
On the Details screen for a Metadata field you can use a keyword replacement in place of a value in a field. For example, you can use a keyword replacement %asset_name% in the Default field. For a full list of keyword replacements that can be used, click on the click here link located under the Details section heading on the screen, as highlighted in the figure below.
The click here link
When you click on this link a pop up will appear showing the full list of available keyword replacements, as shown in the figure below. Highlight the keyword replacement you want to use from the list provided, copy it by pressing Ctrl + C on the keyboard and paste it into a field on the Details screen by pressing Ctrl + V on the keyboard.
The keyword replacements pop-up