Mr ASHTWEY, you are in totally the wrong part of the forum, in fact, wrong setting of the problem.
You have two different devices, with two very different resolutions. So, perhaps you need two different versions of software, or at least with very different settings.
And, before your next question, read:
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P.S. Even if all nicely set up and is almost an identical setting set for both devices, Note 5 have 1440 x 2560 res, Galaxy Mega have 540 x 960.
Note have more than 7 times larger screen area in pixels. It is impossible that the images are identical.