Is there a way to get a useable file from the Nano.

Thanks for the bmp creator. Not sure what all the buttons do, but I can screen print with alt Prt SC and paste into a file.

Question? Is the sampling rate restricting the resolution of the image, or is it simply that this is what the lcd screen can display. What I mean is in future versions of firmware would it be possibe to save a higher resolution saved waveform for examination on a PC?