Unity User Manual 2021.1
Use the Unity Editor to create 2D and 3D games, apps and experiences. Download the Editor at unity3d.com.
The Unity User Manual helps you learn how to use the Unity Editor and its associated services. You can read it from start to finish, or use it as a reference.
If it’s your first time using Unity, take a look at the introductory documentation on Working with Unity, and see the Unity Tutorials.
New
- Features introduced in 2021.1: What’s New
- Upgrading Unity projects from older versions of Unity: Upgrade Guide
Packages
- Learn about packages: Working with the Package Manager
- Find documentation for a specific package: Verified packagesWhen a package passes release cycle testing for a specific version of Unity, it receives the Verified For designation. This means that these packages are guaranteed to work with the designated version of Unity.
See in Glossary and Preview packagesA preview package is in development and not yet ready for production. A package in preview might be at any stage of development, from the initial stages to near completion.
See in Glossary - Learn how to build a custom package: Creating custom packages
Unity User Manual sections
Unity 2D
All of the Unity Editor’s 2D-specific features including gameplay, spritesA 2D graphic objects. If you are used to working in 3D, Sprites are essentially just standard textures but there are special techniques for combining and managing sprite textures for efficiency and convenience during development. More info
See in Glossary and physics.
Graphics
The visual aspects of the Unity Editor including camerasA component which creates an image of a particular viewpoint in your scene. The output is either drawn to the screen or captured as a texture. More info
See in Glossary and lighting.
Physics
Simulation of 3D motion, mass, gravity and collisionsA collision occurs when the physics engine detects that the colliders of two GameObjects make contact or overlap, when at least one has a Rigidbody component and is in motion. More info
See in Glossary.
