Zoom without losing ratio
I searched 'zoom' topics, but didn't an answer to my issue.
In Develop mode I have all panels/bars at top, bottom and sides visible. This leaves a white space between these elements in which my photo is visible. I typically edit with the photo set at 'Fit', which keeps it at the ratio at which it was photographed in the camera - in my case almost always 3:2. There is a white margin around the photograph which will vary in size according to how far extended the bottom and side panels are.
When I zoom IN by hitting 'Z', or clicking the mouse (pointer is showing '+' in magnifying glass), or by using the scroll wheel, the image fills the white margins and zooms to the preset value, or the amount determined by the scroll wheel. The impotant thing here is that my image in now visible at a diferent ratio determined by the extents of the panels/bars at top, bottom and sides.
Is there a way by which I can zoom into the 'Fit' viewing window, as it were, in order to get a quick crop preview at the same ratio, which is important to the pace my workflow, without having to otherwise use the crop function.
