Anywhere you can see a variable, you should be able to right click on it and access its settings. E.g. from a variable added to a report table configuration:
Or a variable in a drop down list in a charts dialog:
Clicking on the variable with the right mouse button will pop up a settings dialog:
This dialog allows you to set:
To make a new var dets file you click on the “Config Vars” button e.g. in the Charts window:
Enter the new name you want and click on the “Apply” button:
And edit a variable in the data form by right-clicking the mouse on a variable header:
which opens the following dialog:
and click the “Update” button: