Preferences

Unity provides a number of preference panels to allow you to customise the behaviour of the editor.

General


Auto Refresh	Should the editor update assets automatically as they change?
Load Previous Project on Startup	Should the previous project be shown at startup?
Compress Assets On Import	Should assets be compressed automatically during import?
OSX Color Picker	Should the native OSX color picker be used instead of Unity’s own?
Disable Editor Analytics	Can the editor send information back to Unity automatically?
Show Asset Store search hits	Should the number of free/paid assets from the store be shown in the Project Browser?
Verify Saving Assets	Should Unity verify which assets to save individually on quitting?
Editor Skin	Which color scheme should Unity use for the editor? Professional users have the option of dark grey in addition to the default light grey Personal skin.
Enable Alpha Numeric Sorting	This option enables a new button in the top right corner of the Hierarchy window, allowing you to switch between Transform sort (which is the default behaviour) and Alphanumeric sort.


External Script Editor	Which application should Unity use to open script files?
External Script Editor Args	Windows only. What arguments to pass to external script editor. $(File) will be replaced with a path to a file being opened. $(Line) will be replaced with a line number that editor should jump to. See examples below.
Add .unityproj’s to .sln	Should Unity add UnityScript (.unityproj) and Boo (.booproj) projects to the generated solution (.sln) file? Enabled by default for MonoDevelop and disabled by default for Visual Studio.
Editor Attaching	Should Unity allow debugging to be controlled from the external script editor?
Image Application	Which application should Unity use to open image files?
Revision Control Diff/Merge	Which application should Unity use to resolve file differences with the asset server?

Examples for script editor args:

Gvim/Vim --remote-tab-silent +$(Line) "$File"

Notepad2 -g $(Line) "$(File)"

Sublime Text 2 "$(File)":$(Line)

Notepad++ -n$(Line) "$(File)"

This panel allows you to choose the colors that Unity uses when displaying various user interface elements.

This panel allows you to set the keystrokes that activate the various commands in Unity.


Maximum Cache Size (Gb)	The GI cache folder will be kept below this size whenever possible. A background job will periodically clear out unused files.
Custom Cache Location	Allows a custom location for the GI cache. The cache folder will be shared between all projects.
Cache compression	This enables a fast real time compression of the GI Cache files to reduce the size of the generated data. If you need to access the raw Enlighten data you should disable Cache Compression and clean the cache.
Clean Cache	Use this button to clean the cache.
Cache Size	Current Cache size.
Cache Location	Current Cache location.


Maximum Sprite Atlas Cache Size (GB)


Use Cache Server	Should the cache server be enabled?
IP Address	IP address of the cache server, if enabled

Editor Features

Build Settings