Sub Form column Size to be Fixed

Hi team,

I have a sub form inserted into a main form.  Now I want to fix the column width of each and every column that is showing up in the Sub form.

I have attached a sample database.  In this you will have a from named as Testing.  In this I have inserted a Sub From, Now I should be able to fix the coloumn with of each of the column of data that is showing up.

Please adivse how do I achive this.

Thanks,
Sandesh.
Check-Payment.accdb