How to lock Layer from Moving or Shifting

andrewviolet Posts: 1 Just Starting Out

So I have been working with my son on lightsaber VFX and we keep running into the frustrating issue of the layer getting shifted(The reticle with the green and red arrow and blue box for rotating). We end up doing a lot of key framing only to later find out that some where the layer shifted or got moved and then suddenly all of the key frames are wrong. I have to think there is a way of locking this layer. Can anyone help?