Ableton Forum

Preferences > Plug-Ins > Plug-In Windows > Auto-Hide Plug-In Windows

With this option checked, either ALL floating windows disappear when you select a different track, or ALL floating windows stay open until you explicitly close them.

I think most of the time most people will prefer floating windows to auto-hide when a different track is selected—it just makes windows management so much easier—, so my guess is most Live users have this option enabled. The problem is some times you need one or two floating windows to remain visible, while all the others auto-hide as usual. For example, you might want a spectrum analyzer, or a limiter master bus limiter, etc, to stay visible the whole time. At the moment it's all or nothing.

In Studio One floating windows also auto-hide, but they have a 'pin' button on the title bar. When this button is active, the window remains visible, until the window is explicitly closed by the user, or the pin button is disengaged. This works a treat. I'd love to see something like this implemented in Ableton Live. Thanks!.

https://youtu.be/YZ9iPH36yJo

Yes, please

Absolutely! It would be sexy af ∠( ᐛ 」∠)_ if Ableton allowed multiscreen users to pin/un-pin plugin windows to various different screens (whether they're hidden or not) as well as select certain plugins to remain open (say from different tracks) while hiding some or all other plugins.

･｡ﾟO o

Yes, definitely need this please! I'm a long term Cubase user, trying out Live, and it's a big annoyance that I can't leave say a Spectrum Analyser open on the Master bus while adjusting plugins on the other channels.

Turn off auto-hide plug ins in the preferences.

This wont go anywhere, but heres a +1 anyway. Hopefully some day