Clarity discussion forum

Dear colleges.
Occasionaly we open a number of chromatograms at the same time, the reason for this being quite obvious: comparison of chromatograms. Of course baseline or retention sometimes deviates and needs to be corrected before we try to do quick evaluation. For multiple chromatograms, it is usually possible to do two types of shifting: both horizontal and vertical. It is important to be able to do each movement (horizontal or vertical that is) separately because in most cases, unwanted shifts usually occurs only in one direction. There are two icons that allow us to shift a chromatogram with respect to the other: Move (SHIFT = Whole Chromatogram) and Scale (SHIFT = Whole Chromatogram). Unfortunately the icons allow us to move the whole chromatogram both horizontally and vertically. If we try to lower a chromatogram with an unusually high baseline, it almost always shifts sideways and retention changes. Afterwards, comparisons are no longer accurate enough and that makes the whole procedure
useless. We would like to know how to fix position of the chromatograms in one direction if shifting is being done in the other. First we thought the two icons were invented for this but it didn't work that way. Any ideas?

Thanks,
Albert Russ and Maria Simekova

Dear Albert and Maria

after using the move command you can switch to the "Graph Properties - Signals" dialog using the "Signal Parameters" icon which just next to the "Move" and "Scale" icons and there set the "Y Offset" value to zero.

I have made a suggestion to incorporate a function that would lock the moving to one of axis only after pressing a key (e.g. CTRL) - like it is in e.g. in graphical softwares. So it could appear in some of the future versions.

with best regards

Petr Kohutek
DataApex

PS: Additional votes can move such function higher in the importance list.