To have a Separate ledger posting for Sales and Purchase Freight amount, please find the below steps.
Click on Tools-->Options-->Options
Search for the configuration "Separate ledger posting for Sales and Purchase Freight amount" and enable it.
Make Sales and Purchase bill with Freight Charges as shown below for both Purchase and Sales.Purchase
Sales
Now the freight amount given in purchase will be posted to ledger "PACKING CHARGES(EXPENSES)" and the ledger "PACKING CHARGES" for freight in sales.
To verify go to accounts and open Reports--Account Books>--Ledger reports, open the above-mentioned ledger after saving a purchase or sales with freight amount to check.