STL files

Hi everyone,
If I have an STL file that I downloaded from a website, can I edit this file ?
and how ?

Grab a CAD program that can import STL formats [SketchUp with STL plugin and Blender are the ones I've used, I believe OpenSCAD can do this? Just do some research]

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Realizer- One who realizes dreams by making them a reality either by possibility or by completion. Also creating or renewing hopes of dreams.
"keep in mind, even the best printer can not print with the best filament if the user is the problem." -Ohmarinus

Also, wrong place to be asking questions. This is a place for putting your ideas out there and getting help designing it.

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Realizer- One who realizes dreams by making them a reality either by possibility or by completion. Also creating or renewing hopes of dreams.
"keep in mind, even the best printer can not print with the best filament if the user is the problem." -Ohmarinus