AE CopyPaste

Copy, paste, organize and precompose in one panel.

What it does

Copy: copies the current comp frame to the clipboard
Paste: pastes an image from the clipboard into the active comp as a new layer
Organize: sorts project items into Images, Videos, Audio, Compositions, Pre-Comps, Solids and Others folders
Precompose: pre-composes the selected layers and crops the new comp to their visible content and time span
Alt+Click on Precompose: un-precompose the selected pre-comp layer, its layers return to the same place and time
Clear Anim.: freezes the current look and removes all keyframes and expressions (effects are kept)

Close After Effects.
Unzip the download and copy AE CopyPaste.jsxbin into the ScriptUI Panels folder: C:\Program Files\Adobe\Adobe After Effects <version>\Support Files\Scripts\ScriptUI Panels\ (macOS: /Applications/Adobe After Effects <version>/Scripts/ScriptUI Panels/).
If an older AE CopyPaste.jsx is in that folder, delete it first so the panel does not appear twice.
Start After Effects.
Turn on Allow Scripts to Write Files and Access Network: Edit > Preferences > Scripting & Expressions (macOS: After Effects > Settings > Scripting & Expressions).
Open the panel from Window > AE CopyPaste.jsxbin and dock it anywhere.

Status messages also appear in the Info panel (Window > Info), useful when the panel is small.
Copy and Paste use the composition open in the Viewer, even when another panel is active.
Precompose crops to what is visible at the current time indicator, so place the playhead where the content is fully visible first.
Every action can be undone with a single Ctrl+Z.
Save your project before using Paste: pasted images go into a CopyPaste Images folder next to the project file. Keep that folder with your project.