How to organize layers in Photoshop?

How to organize layers in Photoshop?

- A layer shows an image / picture.

- Multiple layers are used to place separate images / pictures.

- Place various images in separate layers.

- Lock the unused layers.

- Unlock the layer that is in use.

- When 2 or more layers need to be changed, unlock the layers.

- Ensure that at least one layer is unlocked.