Quick or Quickly: “How to Install a PHP Extension: Quick and Easy” [duplicate]
Let’s say I have this title:
How to Install a PHP Extension: Quick and Easy
Should I say quick and easy or quickly and easily?
Why?
The terms Quick and Easy modify Install. Technically, since install is a verb, they should be adverbs - Quickly and Easily.
However titles have a life of their own, and they often exist on a different planet than we prescriptivist grammarians. You get a lot of latitude.
Additionally, the adjectival forms have an implied noun to modify: installation. You are suggesting the installation will be quick and easy.
To be a purist, make them adverbs. Or you can leave it punchy.
Quick is what we call a flat adverb...Do it nice and easy, nice and slow, drive quick, stay safe...these are all grammatically correct.
I'd keep the title.