1. Drag a Camera asset into the Viewer window from the Asset browser. The new camera is added to the Scene browser’s list of Custom cameras, beneath the Camera switcher.
2. Rename a custom camera by right-clicking it in the Scene browser’s Cameras folder, or the Viewer window, then selecting Rename from the contextual menu.

To add multiple cameras:

1. Double-click the Camera asset in the Asset browser. The cursor becomes a cross hair.
2. Click anywhere within the Viewer window to place a camera at that point.
3. Press Escape to cancel the operation or Enter to accept it.