It changes to Edit Puppet mode.

Nodes and Inspector can be only edited in this mode.
Animation list and Timeline can't be edited in this mode.

On this panel, you can set ambient light color. The effect will be shown if you enable post processing.

On parameter you can set parameter to use to animation or to make physics.

You can set layers behaviour on parameter.

Configuration of parameter.

• Edit prorprietres: name, constraints
• Edit axes points: break points + delete
• Split
• To 2D
• Flip
• Mirror: horizontally, vertically
• Mirrored autofill: ←, →

• Copy
• Paste
• Paste and horizontal flip
• Duplicate
• Delete

• Set starting position

You can origanize your puppet layers here.
Group layers you did on drawing program won't be inherited.

There you can group layer by many types of nodes: (Check this page for basic concept)

• Simple Node
• Mask
• Composite
• MeshGroup
• Simple Physics
• Camera

You can edit Node proprieties on Inspector.

Nodes that have Transform: Layer (from drawing Software), simple Node, simple Physics, Camera, Mask, Composite and MeshGroup.

• Translation: x, y, z
• Lock to root node
• Rotation: x, y, z
• Scale: x, y
• Snap to pixel
• Sorting

Nodes that have Drawable: Layer (from drawing Software), Mask, Composite and MeshGroup.

• Texture offset

Layer (from drawing Software) is only Node that has Part.

• Albedo: “original color” (original art from layer). More about Albedo.
• Emissivity: “how strong illuminates” (glow up eyes in darkness)
• Bump maps: “create illusion of depth” ( if it's wrong)

Nodes that have Tint: Layer (from drawing Software) and Composite.

• Multiply RGB
• Screen RGB

Nodes that have Blending: Layer (from drawing Software) and Composite.

You can check blending list here.

Nodes that have Opacity: Layer (from drawing Software) and Composite.

Nodes that has Masks: Layer (from drawing Software) and Composite.

• Thereshold
• Mask Sources: Mode mask, Mode dodge; Delete

Simple Physics is only Node that has simplePhysics.

• Parameter
• Type: pendulum, springpendulum
• Mapping mode: anglelength, xy
• Local transform lock
• Gravity scale
• Length resonant frequency
• Damping: x, y
• Outputscale: x, y

Camera is only Node that has Camera.

• Viewport: x, y

MeshGroup is only Node that has Meshgroup.

• Dynamic deformation: slower
• Translate origin

You can see list of all things you did.
By selecting one of them, you can undo until that point of work.