Personally, I set the SSB tuning steps to 500kHz. Most SSB QSO's are on whole digit kHz frequencies. i.e. 3928 kHz, 7255 kHz, 14300 kHz etc.
On17M there's lots of activity on 18157.5 kHz so hence my selection of 500kHz
Makes for fast tuning across the band with the use of the scroll wheel on the mouse. If you do have to 'fine tune', simply hover over the 1/10, 1/100, or 1,1000 of kHz digits in the DSP panel and scroll.

The AM'ers though... they are all over the place on 160m and 80m due to the 'vintage' equipment used.  

YMMV

73 Kriss KA1GJU