To rename a layer, do the following:

1. Expand the Layers https://cdn.elev.io/file/uploads/Nx6j1ilgYkjKwwUzxKv9Jx2yWyIGUZG4VbEE9W71H30/2k39xjx-KJw4oQslo6UEkMajmdALWRK85wsyJXumHgM/layers-V2A.png tool from the right toolbar.

2. Double click the layer you wish to rename, then enter the new layers name.

https://cdn.elev.io/file/uploads/Nx6j1ilgYkjKwwUzxKv9Jx2yWyIGUZG4VbEE9W71H30/yuP_lgEnGeP85b6DoQR-Vn1mThDkVLEPUwFKKZtyJZc/renaming a layer.fw-6HU.png

3. Press Enter and save your page when you're done!