Keyboard shortcut to access sub items in tool window header
Is it possible to navigate tool window header options using keyboard? For example, Microsoft IDEs have SHIFT + ALT option to Move to the current tool window toolbar.

I would like to use keyboard shortcuts or some type of tab navigation to access second options row.
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Hello,
What actions would you expect to be performed? "select opened file", "expand all"? You can navigate a mouse on each sign and there will be a pop-up window with a shortcut hint.
Under the keymap settings https://www.jetbrains.com/help/pycharm/settings-keymap.html you can find a desired shortcut or set your own. Also, see how to learn shortcuts as you work https://www.jetbrains.com/help/pycharm/mastering-keyboard-shortcuts.html#learn-shortcuts