The denote-history-completion-in-prompts option

The user option denote-history-completion-in-prompts toggles history completion in all denote-prompts-with-history-as-completion.

When this user option is set to a non-nil value, Denote will use minibuffer history entries as completion candidates in all of the denote-prompts-with-history-as-completion. Those will show previous inputs from their respective history as possible values to select, either to (i) re-insert them verbatim or (ii) with the intent to edit them further (depending on the minibuffer user interface, one can select a candidate with ‘TAB’ without exiting the minibuffer, as opposed to what ‘RET’ normally does by selecting and exiting).

When this user option is set to a nil value, all of the denote-prompts-with-history-as-completion will not use minibuffer completion: they will just prompt for a string of characters. Their history is still available through all the standard ways of retrieving minibuffer history, such as with the command previous-history-element.

History completion still allows arbitrary values to be provided as input: they do not have to match the available minibuffer completion candidates.

Note that some prompts, like denote-keywords-prompt, always use minibuffer completion, due to the specifics of their data.

[ Consider enabling the built-in savehist-mode to persist minibuffer histories between sessions.]