Spectrum baseline can be set only at bottom or center

It would be useful to be able to adjust position of baseline with a slider that would appear at the top tool menu upon clicking "Adjust baseline" button. The slider would be set by default to 50% and thus would replace the "Baseline center" button and the users could use the slider to adjust position. The "Baseline bottom" would hide the slider and bring baseline back to bottom
The current solution is OK for inspecting the spectra but it's suboptimal for creating images. I paste here an example image that some users would hesitate to put into reports and rather use other software to recreate the image.