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Gnuplot version 3.7 contains many new features. This section gives a partial list and links to the new items in no particular order.
1. `fit f(x) 'file' via` uses the Marquardt-Levenberg method to fit data. (This is only slightly different from the `gnufit` patch available for 3.5.)
2. Greatly expanded section 2.10.1.7 using command. See section 2.10.1.7 using.
3. section 2.18.54 timefmt allows for the use of dates as input and output for time series plots. See `Time/Date data` and timedat.dem.
4. Multiline labels and font selection in some drivers.
5. Minor (unlabeled) tics. See section 2.18.33 mxtics.
6. section 2.18.22 key options for moving the key box in the page (and even outside of the plot), putting a title on it and a box around it, and more. See section 2.18.22 key.
7. Multiplots on a single logical page with section 2.18.31 multiplot.
8. Enhanced `postscript` driver with super/subscripts and font changes. (This was a separate driver (`enhpost`) that was available as a patch for 3.5.)
9. Second axes: use the top and right axes independently of the bottom and left, both for plotting and labels. See section 2.10 plot.
10. Special datafile names `'-'` and `""`. See section 2.10.1.5 special-filenames.
11. Additional coordinate systems for labels and arrows. See `coordinates`.
12. section 2.18.46 size can try to plot with a specified aspect ratio.
13. section 2.18.30 missing now treats missing data correctly.
14. The section 2.2 call command: section 2.8 load with arguments.
15. More flexible `range` commands with `reverse` and `writeback` keywords.
16. section 2.18.15 encoding for multi-lingual encoding.
17. New `x11` driver with persistent and multiple windows.
18. New plotting styles: section 2.18.47.15 xerrorbars, section 2.18.47.8 histeps, section 2.18.47.6 financebars and more. See section 2.18.47 style.
19. New tic label formats, including `"%l %L"` which uses the mantissa and exponents to a given base for labels. See `set format`.
20. New drivers, including `cgm` for inclusion into MS-Office applications and `gif` for serving plots to the WEB.
21. Smoothing and spline-fitting options for section 2.10 plot. See section 2.10.1.4 smooth.
22. section 2.18.29 margin and section 2.18.38 origin give much better control over where a graph appears on the page.
23. section 2.18.6 border now controls each border individually.
24. The new commands section 2.7 if and section 2.15 reread allow command loops.
25. Point styles and sizes, line types and widths can be specified on the section 2.10 plot command. Line types and widths can also be specified for grids, borders, tics and arrows. See section 2.10.6 with. Furthermore these types may be combined and stored for further use. See section 2.18.24 linestyle.
26. Text (labels, tic labels, and the time stamp) can be written vertically by those terminals capable of doing so.
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