I really don't use Excel often and I don't really know how it works when it starts to be complicated.
Let's say I have an Excel document, very beautiful with different colors and backgrounds for different cells, some font-size, alignments...
I export the data in a csv file ans re-import it in Excel.
Of course there is no style, everything is gone and displayed in a raw way.
Is it possible to save (I know I should not say that) the stylesheet?
I understand there are some themes in Excel but when I apply those themes it changes the size of the font... that's it... no colors no text align..
Excel styles only apply to manually selected ranges.
You could keep one file with the formatting as a template, open the new csv file, switch back to the template file, click on format painter (the yellow brush), switch back to the csv file, paste.
The format painter copies the formatting of a range to another range, so it will work as long as the selected ranges have of the same size.