Control Panel
Analogue switches, dials, and buttons, buttons, buttons (just like that Flickr group I linked to).
Link tags: knobs
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User Interfaces for Variable Fonts · An A List Apart Article
A good introduction to variable fonts, and an exploration of the possible interface elements we might use to choose our settings: toggles? knobs? sliders? control pads?
Control Panel | Flickr
Photos of analogue interfaces: switches, knobs, levers, dials, buttons, so many buttons.
