Ok, that was exactly my thinking before I discovered the float function… one second, I need to look something…
If you want to organize your notes in a separate window, consider having a separate note project that is always open. This is a normal Scrivener project that you can position as a small window on one edge of your Screen, just like the Scratchpad. The float function can be activated via the “Window” menu. I use Scrivener in German, so I don’t know what the menu item is called in English. It is right under “Layouts”. So you have a “scratchpad” with all the features Scrivener offers.
Have a look here