Is it possible to show the dropdown option in the search box as pop out occupying a screen or something like that because in my dashboard I'm using the search box at the left bottom and if I press the dropdown the values shown as dropdown is not visible. Is there any provisions to show the dropdown as something else?
Could you specify which 'search box' are you using? Is that minimized list box or a special extension made by third party? Usually, if a list box is placed close to edge of window, it will adapt its popup directions and positions itself.
However, for a full screen selection, you might try 'search tool' button on right upper corner and see does that solve you problem: