The `tpic` terminal driver supports the LaTeX picture environment with tpic \\specials. It is an alternative to the `latex` and `eepic` terminal drivers. Options are the point size, line width, and dot-dash interval.
Syntax:
set terminal tpic <pointsize> <linewidth> <interval>
where pointsize and `linewidth` are integers in milli-inches and `interval` is a float in inches. If a non-positive value is specified, the default is chosen: pointsize = 40, linewidth = 6, interval = 0.1.
All drivers for LaTeX offer a special way of controlling text positioning: If any text string begins with '{', you also need to include a '}' at the end of the text, and the whole text will be centered both horizontally and vertically by LaTeX. — If the text string begins with '[', you need to continue it with: a position specification (up to two out of t,b,l,r), ']{', the text itself, and finally, '}'. The text itself may be anything LaTeX can typeset as an LR-box. \\rule{}{}'s may help for best positioning.
Examples: About label positioning: Use gnuplot defaults (mostly sensible, but sometimes not really best):
set title '\\LaTeX\\ -- $ \\gamma $'
Force centering both horizontally and vertically:
set label '{\\LaTeX\\ -- $ \\gamma $}' at 0,0
Specify own positioning (top here):
set xlabel '[t]{\\LaTeX\\ -- $ \\gamma $}'
The other label – account for long ticlabels:
set ylabel '[r]{\\LaTeX\\ -- $ \\gamma $\\rule{7mm}{0pt}}'"