Up to Unity version 2022.2, Unity used a different format for spriteA 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 atlas assets called Sprite AtlasGraphics: A utility that packs several sprite textures tightly together within a single texture known as an atlas. More info. 2D: A texture that is composed of several smaller textures. Also referred to as a texture atlas, image sprite, sprite sheet or packed texture. More info.
See in Glossary V1.
To upgrade Sprite Atlas V1 assets to Sprite Atlas V2 assets, follow these steps:
The InspectorA Unity window that displays information about the currently selected GameObject, asset or project settings, allowing you to inspect and edit the values. More info
See in Glossary window for a V2 sprite atlas is the same as a V1 sprite atlas. For more information, refer to Sprite Atlas Inspector window reference.