The Objects for Packing list displays the currently selected items that are in the 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. You can place Texture2D and Sprite Assets in this list. Drag and drop a folder directly onto the list to automatically add all valid content within the folder to the list (only the folder appears on the list).
To select specific items for the list:
Select the Sprite AtlasA utility that packs several sprite textures tightly together within a single texture known as an atlas. More info
See in Glossary Asset and find the Objects For Packing list in its 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. It displays the list of items for Unity to pack when it builds the Sprite Atlas.
To add items, select the plus (+) icon at the lower right of the list to create a new row. Drag a valid Asset onto an empty row to add it to the list, or select the circle icon to the right of the row to open the Select Object window. Select an Asset from the Object Picker window to add it to the list:
To remove an item from the list, click the minus (-) icon at the lower right of the Objects For Packing list. To replace an item, drag another item to the row it occupies to replace it on the list.
Select Pack Preview to preview the combined Atlas Texture in the Asset Preview window.