Hi Hiryo,
The layout: "Document detail" is used to show document details page. When you use this menu layout, in parameter form, you should select specific document in the dropdown select list. If you don't select any document, at frontend, when you access to the menu, you will have the error message: "Invalid Document or you are not allowed to view that document"
Currently, Edocman only has menu layout to show documents of specific Edocman category. It's impossible to show all documents of Edocman system at frontend through one menu layout.
Thanks
Dam