[djfobbz]

I like this. However, I just gave your Sheets a simple stress test by selecting a bunch of cells, then using the fill handle to populate other cells, and afterward doing an undo (Ctrl+Z). It completely crapped out and did not do what I expected...which was to return to its original state prior to using the fill handle, with the selection still selected.

[nathanstitt]

Sorry it didn't work :( I just tried and looks like it got _so close_, it did undo the insertion of values, but the selection remained. I think that's probably debatable behavior, but isn't what Google Sheets does.

I may be mis-understanding what you experienced though, If you'd like to provide more details and/or some screenshots please file a issue https://github.com/tinycld/calc/issues