How to move (the view) from one layer to another?

Hello, I hope that you’ll be able to help me with this little problem: I was working on a Pikachu costume for a character and I decided to model the tail in a different layer than the one where the rest of the costume and the character were, then, when I moved the tail to the other layer in order to join it with the rest I couldn’t find the twenty small boxes that represent the layers in order to move to the layer where everything is now.

This is what I see:

Please help! Thanks in advance!

You are in local view (look at the indicator in the top left corner of the 3d view)
Toggle between global and local view with the numpad / key

Thanks a lot!