General Ledger –> Setup –> Chart of accounts –> Chart of accounts
Click on the Configure account structure button on the chart of account form to modify the existing account structure.
System will open the Configure account structures form; selecting the account structure that is attached to the Chart of account.
Edit the account structure so that the status of the account structure is set to Draft.
Make the desired changes; just like the above screenshot we are adding a new dimension segment to the account structure
Once the changes are completed click activate button.
On the confirmation message (below) from the system press Yes