I have 2 needs for the Preview
Small view - to identify file content
Large View - to allow full reading of content
it is a nuisance to need to manually change between Panel-sizes
and if I default to Large-size then the Preview panel takes up too much space.
My work-around so far has been to open/close a large size Preview Panel
(I have assigned the key-press " ` " to 32934 so that I can do this with a single keypress - too lazy to use CTRL+Q

I have also begun to use the preview FLOAT & DOCK feature ... this works quite nicely, but I have to use the mouse, which is fiddly.
Is there a way to associate the Float/Dock action to a keypress (or macro?)
Thanks