Manage your Preferences in Sublime Text 3 is a crucial step to enhance your workflow.
To understand the Preferences management you must understand that each component of Sublime Text, from the text editor itself to the external plugins, has 2 files which compose its settings, both in JSON language : a Default Settings file and a User Settings file.
The Default Settings file sets the default settings and provides by including comments a reference for the User Settings file.
All the User Settings files are stored in the User Packages folder.