How to create an index?

Installed

• Windows 7 x64
• MS Sql Server 2014
• heidisql 9.5.0.5201 (64 Bit) portable

I try to create an index through the interface "heidisql". I get the error.
"Ошибка SQL (102): Incorrect syntax near 'AUTO_INCREMENT'"

How to create an index?

Link to video - youtu.be/5grMIcXgxvM

For MSSQL servers, I recommend you try to compose the SQL for it manually, in a Query tab. The table editor is not very compatible when you change a MS SQL table.

as12