Often times when you are creating complex illustrations or layouts, you create a bunch of layers to help organize everything. During this work, you may end up using a layer temporarily and nothing will be on it later. Doing this often will give you many unused layers and it's very difficult to tell if a layer has something on it or not.

Well there is an easy way to tidy up a long list of layers, removing those that are empty and at the same time, letting you know if there are anything on the layers.

First, make sure nothing is selected, then click on the first layer in the list. Then Shift+Click on the last layer in the list to select all the layers at once.

Then in the pull-down menu, select Remove.

You will get a warning dialog box with two choices shown above. In this case we just want to remove the Empty layers, so choose the Empty option.

Instantly the empty layers are removed and you are left with only the layers with Data on them. In the example above, everything is on the Final layer (Not sure why it made the Background layer active).