I'd like it to be easier to construct documents with hierarchies of titles, subtitles, subsections, etc.
For example, sometimes I am not sure if I should be starting a new section, or a new subtitle... I often find myself selecting the most previous non-input/output cell to determine what kind of section I am in, click on the formatting menu item and search to see what what my current environment is.
This would be simplified if I had an option---say in the Working Environment---to turn on a visual indicator or a tool tip that I could use to identify the different kind of cells.
I wonder if anyone else might find this useful?