Short Version
Generate only creates a local signed proof. It does not send an on-chain transaction and it does not publish the listing. Submit uploads that proof to the selected Shakedex channel so buyers can see it.
Bob Docs
Bob uses a few words that sound similar but mean different things. This guide explains which steps are on-chain, which steps are local, and when a listing becomes visible on a Shakedex market.
Generate only creates a local signed proof. It does not send an on-chain transaction and it does not publish the listing. Submit uploads that proof to the selected Shakedex channel so buyers can see it.
The Buy Now price in the Generate Listing Proof screen is editable because proof generation is local. If you change 45 HNS to 50 HNS before generating, the new proof uses 50 HNS. If you change it to 10 HNS, the new proof uses 10 HNS.
Be careful after a proof has been shared or submitted. An older lower-priced proof may still be fillable until the listing lock is cancelled. Do not distribute multiple proofs unless you understand that risk.