Overall Result - must change the text to 'total' in Graph and cross tab

Hello Experts,

PFA Image. The Overall result 'text' comes from the query. I am trying to change it to 'Total'.

However there is no option available in ´edit Initial view´.

I tried CSS for crosstab to Change this text, however this didnt work as expected. With CSS I cannot rename the column Name. I can only append the text. Tried different ways in CSS , however didnt work.

Is there any work around in Design Studio or this text should be changed only at the query end.

Thanks for your Feedback.