noun
marking
MAR-king/ˈmɑːrkɪŋ/
A visible sign or pattern that identifies or distinguishes something.
An upward-arrow marking identifies the crate's correct orientation.

Etymology
The noun names not just the action of making marks but also its visible result. That action-to-result connection was already present in Old English, where the word could mean a mark or pattern of marks.
In context
… noise strips are appearing on domestic roads. This is a special type of marking made by a special technology …
More examples
- White markings on the pavement separate the parking spaces.
- We recognize our dog by the markings on her face.
- Each cable has a colored marking that identifies its purpose.
Forms
marking · markings
mark verb — To leave a visible sign on something.