Part for Multiple Drawings

Hi, I am brand new to SW but not new to CAD. I have a question about using a part in a variety of different assemblies.

If I create a part and uses it in any number of assemblies and decide that the part must be edited for a specific drawing will editing it in the drawing affect all instances in all drawings wherever it is located? Or are all instances everywhere only affected if it is edited via the library palette?

If a user does edit the part in the file should the current part be renamed when saved in the current drawing?

SolidworksParts And Features