I recently purchased Fanatec's button cap/decal pack and I have to say, it's a very worthwhile, inexpensive, and idiot-proof bit of kit. The customization options are incredibly vast, with ~20,000 possible combinations
Button Labels - Fanatec - InsideSimRacing Forums
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Buttons Caps. — Fanatec Forum
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Button Caps and Sticker Set | Steering Wheel Accessories | Accessories | Fanatec
Button Caps and Sticker Set | Steering Wheel Accessories | Accessories | Fanatec
Button Caps and Sticker Set | Steering Wheel Accessories | Accessories | Fanatec
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Got my PME button caps done and mapped in ACC. : r/Fanatec
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New: Customisable Button Caps! — Fanatec Forum
For anyone interested in what you get from Fanatec's button cap/sticker set, here's a quick overview of the contents and the numerous different function labels to choose from. A few friends asked
Fanatec on Twitter: "The smallest details make the difference! Make your Fanatec steering wheel unique with the fully customisable button caps and sticker set. For more details: https://t.co/z5qGlRZceo https://t.co/hTTQikkVRl" / Twitter
New: Customisable Button Caps! — Fanatec Forum
Custom buttons for Fanatec wheels | RaceDepartment