Using the checkbox option

Navigate to the VA01 Overview screen in SAP and open the 'SAPMV45A.E4001.sjs' script file. Create this file if it does not already exist. All additions will be made to this file.

The VA01 overview screen appears as follows:

You can convert a column into a checkbox with the checkbox option in the column command.

Add the following code to the three checkboxes we previously created:
```
"readonly":true
```

The code will now appear as follows:

checkbox([11,15], "Check1", {"name":"z_chkbx1", "readonly":true, "default":"x"});
checkbox([13,15], "Check3", {"name":"z_chkbx2", "readonly":true});
checkbox([12,15], "Check2", {"name":"z_chkbx3", "readonly":true});

The VA01 screen will now appear as follows: