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How to change the size of the icons in the notification area of the Panel (I've added a screenshot).
I've tried to change the size of the top bar too but failed. If you can help me with that as well please do tell.
short answer : those cannot change size. You can change their style with themes, but then size is fixed.
What can be done, however, is to use Settings->Display options to scale top panel up , but that will scale up over all UI, so this might not be exactly what you want
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