For the chamstation, there is a "summed peak" option for the report style - to sum all the peaks having same name.
However for the latest CDS, peaks with same naming is prohibited and how do I sum/ total up the peaks area% ?
You can summing peaks by using peak summing in the calibration table and then this appear in final report
In CDS you can summing peaks by right click in the peak identification then add a timed group and you can change time group window .
To get sum/ total up the peaks in area%
from Report then Specify Report then Quantitation settings choose from calculate Percent