Here you can learn about how to enable the cash ledger in bank or cash summary book.
Step1: Go to Accounts module>>>Select the Bank/cash Report (Fig1.)
Step2: Select the report of Bank Cash summary. (Fig2.)
Step3: In Bank Book Summary Report select the Date Range, Account and Category and click the Submit button. If any Bank or Cash Account will not reflect the Drop Down list (Fig3.)
Step4: Now to enable the same, open the COA Master under Accounts Module. (fig4.)
Step5: Click the Edit button on COA e.g. : (Petty Cash). Check the Category is to be under Cash. (Fig5.)
Note: If Bank not getting in Report, kindly check the category is updated as Bank.
I hope you got an idea about how to enable the cash ledger in bank or cash summary book.