I cannot add plain "dialog"

[Anonymous_Banned275]

Am I following wrong procedure ?
I have no "dialog" option to "click".....

Click File|New to invoke the New File dialog, **then click "Dialog",** then click OK.

[ChrisW67]

What application are you doing this in and how does it relate to Qt?

[Anonymous_Banned275]

[ChrisW67]

That looks like Qt Creator (not sure which version). I assume you want to add a Qt dialog to your Qt C++ program.

Am I following wrong procedure ?

Yes

This is what adding a dialog looks like in Qt Creator 5.0.1 or 6.02

and then

So where did you get your instructions?