How to navigate in menus of Dwarf Fortress?

How could I know which navigation pattern I have to use in menu of Dwarf Fortress ?

Sometimes, it's - and +
Sometimes, it's and

It's confusing.


As a general rule:

When the menu is opened by selecting something on the map (such as by querying a building) you need to navigate the menu with + and -. This is so you can still move the main map cursor with the arrows.

On a full screen menu (like the military screen), use the arrow keys to navigate.