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@tgwdnghn - you could put the un-preferred formats into a Secondary physical library so that your Primary library only had the preferred format - thence double click would view that format.
And you could use the Column Colour or Column Icon feature to 'flag' books that have un-preferred formats in the Secondary library.
And/or if you wanted to be really 'cute' you could put file links to the un-preferred formats into a long text custom column on the Primary book, and vice versa. You would have the custom column shown in Book details, to view a secondary format you would click on the file link.
The long text editor (Comments) has a toolbar widget that includes a file browse button that makes its v easy to create the file links.
TIP : It is almost always the case with calibre that there are multiple ways to get want you want. One needs to avoid getting fixated on the first idea one thinks of - i.e. think outside the box.
BR
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