I saw the posts but they do not comply with the request yet because what's needed is either:

A) a document that has a little button at the top that when it's clicked it opens a combobox asking for a few details to populate the document with the whole contract + the specific details selected in the combobox

B) same button but it just modifies the specific details selected in the combobox, in the document which already has the contract template

Is this viable? sounds easy but I have not found a guide for this