Quote:
Originally Posted by brecklundin
good luck trying to write equations as margin notes on any of today's devices other than real computers. It's simply not possible. Studying math requires the ability to record such equation based notes, in this field we rarely need to write words, we use symbols.
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au contraire mon frere- with a digitizer and proper zoom it is possible

With the Boox you can zoom in to a spot, write your note with the stylus and then zoom out to normal page size. Your note is now the same size as the text
the new PocketBooks should (havent tried it yet) also accomplish this and they have the trick new reflow ability to reflow the images in the pdf with the text.
JSWolf is correct that MOST devices less than the 9.7 inch size are not adequate for PDFs but the Onyx and PocketBook devices are teh exception. It's the reason I chose to sell them, they offer incredible PDF viewers that make it possible to view even most technical PDFs on the 6 inch devices.