As much as I love my new Pioneer stereos, the User Interface is also modern, and modern is not always better, especially while driving a car. The older Sony stereos had more buttons, but it was easy to set a CD track to repeat, for example, with a single button press. On my newer Pioneer stereos the option to repeat the current track is buried several layers deep on the menu you access from the "all-powerful" control knob. They're borrowing that idea from Apple, which popularized the concept when they introduced the iPod many years ago. You can google "onion macbook wheel" for a humorous video about Apple taking the single control knob to the extreme!
I took the photo of my '85 Bertone cockpit buttons, and photoshopped it a bit, to compare several possible antenna button ideas. I also wanted to clarify how I use blackout trim tape for such projects. I'm not sure it's clear from my earlier comments, but I don't cut lots of tiny pieces of tape and cover the original ideogram piecemeal. Instead, I use a single patch of blackout trim tape and cut a hole in the middle to reveal the part of the old ideogram that I still want to see. The blackout trim tape is also good at blocking the backlight from getting through the parts of the ideogram I don't want to see anymore -- not even during the night.
For comparison sake I also photoshopped a factory issue antenna motor button into the group. Personally, I like my easier-to-recognize, representational antenna buttons better. On the factory button I can see the antenna itself, but I'm wondering what the horseshoe represents? I'm guessing a magnet, maybe, to represent an electric motor? Certainly one can get used to it, but it's not 100% clear.
It should be pointed out that all of the switches shown, including the factory switch, are on/off style, and would only be used to control a fully-automatic antenna motor. The switch could be connected to any 12v source, but it's better to connect it between the stereo's antenna/accessory control wire and the antenna motor. That way, if the antenna is out, and the car or stereo are turned off, the antenna will also retract, but it will not poke out unless the antenna switch is on.