Hi @Aaholm, the easiest way to see the relative levels of harmonics is to put a marker on the fundamental and the harmonics you are interested in seeing.
This will give you a table that shows the frequency, absolute and relative levels to the fundamental. The fundamental is indicated by the green F on the bottom of the display. You can select the fundamental detection strategy by control+clicking on the THD or THDN button. There you will see the option for the fundamental as being either the SigGen1 settings, the highest peak, or a user frequency.
When reading values from the table, note that the table is sorted. So, you’ll see M2 (3 kHz) is shown at -99.5 dBC while M1 (2 kHz) is at -100.75.
To add a marker, just click on a peak. To delete all the markers, right click and pick “Delete all markers” or hit ‘D’.
If you had to have a bargraph, you could export the raw data and use excel macros to pick a max in a range.