As with most other kinds of objects you work with in the Stingray Editor, you edit properties for your entities in the Property Editor panel.
However, entities can be defined in two different places: inside their own .entity resource files, or inside levels. It is important to make sure that you select the entity definition that you want to edit in the right place:
If you want to modify the components or properties for an entity asset, find and select the .entity resource file you want to modify in the Asset Browser.
If you want to modify the components or properties for an entity within a level, open the level, then find and select the entity in the Explorer panel.
Unlike other kinds of objects that are placeable in a level, you cannot modify the name of an entity within a level directly within the Property Editor.
To rename an entity definition in a level: