I have a layer file for a geology layer containing attributes for "Age", "Rock Type" and "L_Code". The layer has symbology defined using the "L_Code" attribute. But I want the same symbology applied using the concatenated "Age" and "Rock Type" fields. Each L_Code matches with exactly 1 Rock Type value and 1 Age value. How can I do this? See figures below.
This is what the original layer file looks like, defined using the L_Code attribute
This is what I want the final legend to look like. The label column shows concatenated strings from both the Age and Rock Type fields.
Thank you for any help!