LIsbon Elevators
 

Would it be helpful to know location of elevators to facilitate getting around Lisbon?

Lisbon is indeed a hilly city (why does San Francisco get all the renown?) but one public elevator, or lift, is a functioning tourist attraction. The Santa Justa (or Carmo) is a low-cost way to rise to the top. It was designed by a former student of Gustave Eiffel. Municipal information here:
http://www.carris.pt/en/elevators/
As it notes, there are also three functioning funiculars, all designated historic.
Eiffel's tower in Paris remains a fitting monument to the engineer who, along with his students, changed the modern world's aesthetics. The elevator in Lisbon is fussier than what the master himself constructed. He displayed engineering structure as a thing of beauty in itself, not needing the disguise of ornamentation. One of his partners built the signature Dom Porto bridge for the city of Oporto in Portugal where Eiffel himself constructed the nearby Dona Maria Pia, a now-decommissioned railway bridge.
Trivia fans believe Eiffel's only US structure is the iron frame inside the Statue of Liberty.
I'm just showing off, here, folks, but realizing how Lisbon was once on the cutting edge of the industrial revolution adds context to its current rather sleepy reputation.

I don't if you need to know in advance since the signage for the elevators is pretty good. We always found them when we needed them.

Lisbon is VERY hilly ....elevators are not available in many places
comfortable shoes are a must!

That's because Lisbon just because is hilly in some places, is NOT that hilly.