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Is there a way to selectively change the width of the Activity Bar in VSCode (v. 1.14)? I have a 1366×768 screen where every pixel counts, so I would like to make this bar narrow and icons smaller, by at least 50%. In comparison to vertical OS interface elements, e.g. Windows 10 Taskbar or Plasma 5 panel it looks monstrous and out of place:

I've been also trying to find a solution for the Insider version of VSCode, but apart from just hiding it I haven't discovered anything relevant yet.

I have "window.zoomLevel": 0 set in settings.json.

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EDIT (03/03/20): You can also use the customize-ui addon that allows more fine-grained font sizes and other goodies

You can also use the negative zoom trick in settings.json:

{
  "window.zoomLevel": -1,
  "editor.fontSize": 13,
  "terminal.integrated.fontSize": 16,
}

The whole editor will get smaller so you need to compensate editor.fontSize and terminal.integrated.fontSize

This allows for smaller activity bar (unfortunately it acts on everything (icons size, font-size ...)) but I much prefer this than the defaults.