What is the difference between this extension and CTRL+Click on the layer?
Viewing post in Select Content in Aseprite comments
Good question - I honestly wasn’t aware that Aseprite has this feature when I created the extension.
The difference is interaction with the timeline, natively Ctrl+Click will always select only the contents of the active frame on the clicked layer. My extension has a different approach and allows for selecting content of multiple cels, from multiple frames, from multiple layers at the same time - depending on what you have selected on the timeline.