Smoke simulation

Hi,

You can see my problem into the folowing blend file:

The tutorial certainly will be interesting you.
You can find it at the following address:

The result that I want is the YouTube video on the tutorial website.

I’de like to change the values in the ‘Smoke’ panel of the physics Smoke button but the text and the edit box are enbaled (after selecting the cube).
It is the same for the ‘Smoke flames’, ‘smoke adaptive domain’, ‘smoke high resolution’

Here is an interestig thing : I select the cube (domain) and if I click on the ‘none’ button of the physics Smoke button, and If after I choose domain, the text and the edit box are accessible.
I press Alt + A and a smoke less ditailed than the initial smoke appears.

I’d like to know how to disable the smoke edit text and buttons (also in the Emitter particles).

Moreover I’like to know how starting with clicking the cube on domain and Alt + A.
And having the YouTube tutorial result (most ditailed).

Thank in advance.

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