How to set T1 Code as default in Sage while making payments to vendors?

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Hi

I have recently moved by Data to a New Sage File as the old file was so heavy after years of data on it. The Company credentials were created as per the original file but when I am adding Opening Balance and adding payment to suppliers, it is picking the Transaction Code shows as T9. I need this to show T1 as default. How can I change that?

 

 

Thanks

Amit