What is another word for minor feature?

Here are some words that could be used to describe a "minor feature," depending on the context:

General:

* Detail

* Aspect

* Element

* Attribute

* Characteristic

* Nuance

* Subfeature

* Addendum

More specific:

* Refinement

* Enhancement

* Addition

* Appurtenance (for a physical object)

* Trimming (if it's a decorative or functional detail)

* Garnish (if it's a decorative addition)

The best word to use will depend on the specific feature you are describing and the overall context.