As a verb (meaning to show or prove):
* The symptoms of her illness manifested themselves as a high fever and chills.
* Their love for each other manifested in small, everyday gestures.
* The architect's vision for the building manifested perfectly in the final design.
As a noun (meaning a document):
* The ship's captain presented the customs official with the manifest listing all the cargo onboard.
* The airline lost my luggage, so I had to file a claim with the manifest department.
As an adjective (meaning clear or obvious):
* The evidence against the defendant was manifest.
* Her anger was manifest in her clenched fists and red face.
* The joy of the holiday season was manifest in the children's excited faces.
In a figurative sense:
* The power of the storm manifested in the roaring wind and crashing waves.
* Her dreams of becoming a doctor manifested into reality with hard work and dedication.
The best way to use "manifest" will depend on the specific context of your sentence.