While you are working with text, it resides on a layer and is not yet a part of the image. When a text layer is dropped, it integrates with the canvas and can no longer be edited.
To drop a text layer onto the canvas
1 In the Layers panel, select a text layer.
If you want to select more than one text layer, highlight several layers and group them.
2 Click the Layer Commands button at the bottom of the Layers panel, and choose Drop.
at the bottom of the