#008 How to Enable Dark Theme in SQL SERVER Management Studio 18 in 6 quick steps

Step 1: Open Windows explorer C:\Program Files (x86)\Microsoft SQL Server Management Studio 18\Common7\IDE

Step 2: Find ssms.pkgundef

Step 3: Open the file from the step 2 as an Admin and edit the line FROM

         [$RootKey$\Themes\{1ded0138-47ce-435e-84ef-9ec1f439b749}]

TO

        // [$RootKey$\Themes\{1ded0138-47ce-435e-84ef-9ec1f439b749}]

Step 4: Save and close the file

Step 5: Restart the SQL Server Management Studio

Step 6: Go to Tools >> Options >> Environment >> General and set DARK theme options and SAVE

ENJOY your SSMS Dark mode and write world class queries :)