For now, I downloaded the source and figured how to compile and modified PwEntryForm.cs to reflect the fixed-width font and recompiled. Works like a charm. Won't solve the iOS and Mac problem, but one step at a time.
@wellread1 - yes, I can see it there in the Entry View, but that is a single line (and yes, in fixed-width font), but I need a 2-D grid for TFA and with more than about 10 columns, the columns no longer line up, so you have to put a variable number of spaces. Very clumsy. When you really spread them out well enough to see all the columns (28 in my case), then it is too wide for the dialog box. I did install a plugin to allow for adjusting the dialog box, but that is not guaranteed to survive future...
I did find this feature request discussion (#1859 Select Notes Font in Edit Entry Dialog) and up-voted it.
Useful for all the reasons stated above.. grid layouts for two-factor authentication are useful only when using fixed-width font.
I have tried the image attachment, and yeah its a work-around, but then if I change the grid I have to do screen capture, replace the image, and it adds ~50kb to the database even though the information content is only about 40 bytes, which is an inefficient method. As for changing the List Font, it does not carry over to the Notes box. See attached 2 files. I chose Courier New for the List Font, and it is using that, but the Notes section of the entry is still using the System Default. This is under...
I saw a request in 2008 for the ability to choose the font for the Notes field. This would be very helpful for grid look-up (fixed-width font).. There was no response to the 2008 request.