General synonyms:
* Shown
* Exhibited
* Presented
* Revealed
* Demonstrated
* Illustrated
* Illustrated
* Depicted
* Featured
* Outlined
Specifically for visual displays:
* Showcased
* Exhibited
* Presented
* Arranged
* Organized
* Arranged
* Framed
* Set out
Figuratively:
* Manifested
* Evinced
* Evidenced
* Revealed
* Demonstrated
The best synonym will depend on the specific context in which you are using the word "displayed." For example, if you are talking about a museum exhibit, "exhibited" would be a good choice. If you are talking about someone's emotions, "manifested" might be more appropriate.