The attachment viewer by Bob Balfes demonstrates that the current attachment viewer in Notes is pretty much out of date.
Just compare the 2 functions (see image).
We need an attachment viewer that can open the files in read mode within the current pane or an additional pane....
Some of my users have a hard time to understand the options they get when double-clicking (or right-clicking) an attachment. Particularly the 'View' option. So I suggest renaming this to 'Preview'.
Apple uses this terminology also for previewing files with built-in software vs. actual editors.
I would like to see different preferences for the preview pane for the framesets around the mail client. For instance, show the preview pane for the Inbox but not for the drafts or the preview pane takes up half of the screen for the inbox but only 25% for the ...