Emacs: How to activate window for save-as directory selection

Linux
1

In the Emacs config files I just cant find the option to activate opening a separate window (file manager) dialog when I save-as.
On some distros this is activated by default in others it is dired.

So what is the magic config necessary ?

2

Are you talking about Dired? Or some other file manager? Also let us know the Linux distro.

3

Distro MX21
No I dont want to use Dired.
I want to use an external (other) Save-As dialog.
On some distros an external file manager opens up with emacs save-as, but on others not.
I cannot seem to find anything in config files to set it.

4

Is this what you are looking for? GitHub - suntsov/efar: A FAR-like file manager for Emacs

5

No that is not it.
I am looking for the setting in emacs that I can configure the external file manager to be used.
As I mentioned; The same emacs installation will use an external file manager in some distros but not in others. So it must be a setting in emacs I cannot find.

6

For anyone having this problem, here is the solution:

I posted the same question on emacs.stackexchange.com and someone told me to change
use-dialog-box from nil to ‘non-nil’
That did the trick and after saving it globally (non-obvious) it now opens save-as with an external system file-manager window and not with the clunky built-in mini-buffer file-manager