Plot the GMT logo.
By default, the GMT logo is 2 inches wide and 1 inch high and will be positioned relative to the current plot origin. Use various options to change this and to place a transparent or opaque rectangular map panel behind the GMT logo.
Full option list at https://docs.generic-mapping-tools.org/latest/gmtlogo.html.
D = position
F = box
J = projection
R = region
S = style
U = timestamp
V = verbose
X = xshift
Y = yshift
c = panel
t = transparency
position (str) – [g|j|J|n|x]refpoint+wwidth[+jjustify][+odx[/dy]]. Sets reference point on the map for the image.
style (str) –
[l|n|u]. Control what is written beneath the map portion of the logo.
l to plot the text label “The Generic Mapping Tools” [Default]
n to skip the label placement
u to place the URL to the GMT site
Select verbosity level [Default is w], which modulates the messages written to stderr. Choose among 7 levels of verbosity:
q - Quiet, not even fatal error messages are produced
e - Error messages only
w - Warnings [Default]
t - Timings (report runtimes for time-intensive algorithms);
i - Informational messages (same as
c - Compatibility warnings
d - Debugging messages
xshift (str) – [a|c|f|r][xshift]. Shift plot origin in x-direction.
yshift (str) – [a|c|f|r][yshift]. Shift plot origin in y-direction. Full documentation is at https://docs.generic-mapping-tools.org/latest/gmt.html#xy-full.
panel (bool or int or list) – [row,col|index]. Selects a specific subplot panel. Only allowed when in subplot mode. Use
panel=Trueto advance to the next panel in the selected order. Instead of row,col you may also give a scalar value index which depends on the order you set via
autolabelwhen the subplot was defined. Note: row, col, and index all start at 0.
transparency (int or float) – Set transparency level, in [0-100] percent range. Default is 0, i.e., opaque. Only visible when PDF or raster format output is selected. Only the PNG format selection adds a transparency layer in the image (for further processing).