
Index a column using the icon, and toggle option like primary key, unique key etc
When creating new table all the columns by default is set to primary key, I was clicking on the key icon, I thought I can click it and toggle options that allows to un-index other column but not.
And hope it has another additional options in the column null/not-null toggle
that can set default value or defined value as (defined, none, null, not-null)
But this is a great Application!
Thank you!
Answer

To change PrimaryKey to Non-PrimaryKey or vice versa, all you need to do is: move/drag the column above or below line as shown in following help link. (FYI: All columns above line are PKs)
https://support.sqldbm.com/knowledge-bases/2/articles/13-how-to-movecopysortorder-columns
Following screenshot shows horizontal line separating PK and Non PK columns:
Customer support service by UserEcho
To change PrimaryKey to Non-PrimaryKey or vice versa, all you need to do is: move/drag the column above or below line as shown in following help link. (FYI: All columns above line are PKs)
https://support.sqldbm.com/knowledge-bases/2/articles/13-how-to-movecopysortorder-columns
Following screenshot shows horizontal line separating PK and Non PK columns: