I would appreciate it if the "Save button" in the text window could be changed to display the familiar floppy disk symbol rather than a red dot. Looks better and is more intuitive in my opinion. Perhaps this button could also be complemented with a context menu featuring the relevant entries from the "File" menu (Save/Save As/Revert To Saved)?
I've been experimenting with some images. I attach two snapshots. Not sure what's best.
My favourite is floppy2.png. A little less detailed and thus cleaner, I think.