Effect editor

Overview

The effect editor is opened when double-clicking on an asset of type "effect" (with the ".pkfx" file extension) inside the content browser.
This is the window that allows you to create, preview and modify effects.
PopcornFX documentation - Effect editor

Panels

You can hide panels by closing them using the close icon:
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You can show panels again by navigating in the 'View' menu
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You can rearrange panels by grabbing them by their titlebar and dragging them around. Dropping a panel outside the window will undock it.
In the current version of the editor, you cannot yet fullscreen an undocked panel.

The following sub-topics cover each panel in more details