Hi @fcerullo ,
The only complaint in this regard, by users of Tabular Editor 2.x, was the lack of DAX code assist features (sometimes called "IntelliSense"). Especially when you are not a 100% proficient with DAX (and very few people are!), having the DAX code editor assist you in remembering syntax, function parameters, etc. is incredibly helpful.
This has all been addressed with the new DAX code editor used by Tabular Editor 3
To add a calculated column, right-click on the table on which you want to add the column, and choose Create > Calculated Column (ALT+2). Give the column a name and edit its DAX expression using the Expression Editor, similar to how we did for measures above.
More details: Adding measures and other calculated objects | Tabular Editor Documentation
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