Hi @snigo,
Thanks for the feedback!
The idea of sharing is that you can type a custom text and share it on social network to kind of challenge your peers to type it. You’re right, perhaps it is not currently obvious.
And as for editing inputs, the idea is to copy-paste and add own text. Imaging you learn another language and want to memorise some phrases and/or sentences by typing.
It really works for mnemonic reasons, but perhaps not obvious in UI.
Cheers, have a great day