Hi Ron, really I don't recommend trying to customize the UI right when you're first starting with MoI. It's just generally counter productive because many custom UIs that you'll come across are tuned to one particular person's workflow and it may not match your own needs. It's better to wait until you are a little more experienced in using MoI until messing around with that.

But to answer your question - the Lock and Hide icons in the original UI for v3 are located on lines number 125 and 126 in the file SidePane.htm .

- Michael