Apps · The Apps window and launcher
How do I remove the Storage Studio icon from my Dock?
Short answer: Open the Apps window and switch off Show in Dock at the top-right. Storage Studio returns to the menu bar only; the global shortcut still opens the app grid.
Open the Apps window and turn off the Show in Dock switch at the top-right. Storage Studio goes back to living only in the menu bar.
The Dock icon only appears because that switch was turned on; nothing else changes when you turn it off. The global shortcut still opens the grid.