I'm not sure if this is part of cinnamon, but I was wondering if its possible to add a caps lock and num locks notifications (similar to the sound volume or brightness notifications).
Although this is could be proven pointless for desktop computers since most keyboard have a light which shows if its on or off; for Laptops, this could be useful, since most laptops don't have lights, to show if caps lock or num locks are on or off.
Caps lock notification
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Do not post support questions here. Before you post read: Where to post ideas & feature requests
Do not post support questions here. Before you post read: Where to post ideas & feature requests
Re: Caps lock notification
You might try this applet. You can install it via the applet settings.