List of methods IntelliJ 关注

I'm new to IntelliJ, coming from NetBeans. In NetBeans, on the bottom left side of the window, under the list of files in the project, there is a list of methods/fields in the current class.

With IntelliJ, I found that same window using CTRL+F12, but it's a popup. I'd like it to sit permanently on the bottom left instead. How can I do that?

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