set label: cannot choose bold font

[Thomas Wagner]

Hello everybody,

I am trying to put a label somewhere on a graph using the "set label"
command but with a font other than that defined with the terminal.
Please have a look at the following example script:

set terminal pngcairo color enhanced font "Arial,18"
set output "GnuplotFontTest.png"

set label 1 "ABCDEFG" at -9,-17
set label 2 "ABCDEFG" at -9,-20 font "Arial Bold,18"
set label 3 "{/Arial Bold=18 ABCDEFG}" at -9,-23

plot tan(x)
unset output

Labels 1 and 2 are printed exactly like intended, label 3 is not. It
seems as if font names consisting of more than a single word (like
"Arial Bold") are not properly recognized when using code like the one
for label 3. Surrounding the font name by {} or "" also does not help.

Should I submit the font name in a different way? I am using GNUPLOT
Version 4.7 patchlevel 0 (last modified 2012-07-05, Build System:
MS-Windows 32 bit) on a Windows 7 computer.

Thanks in advance,
Thomas