GMT Themes

GMT offers 3 built-in themes (classic, modern, and minimal). Classic theme is the default for classic mode and modern theme is the default for modern mode. You can also create and use your own themes by compiling files of desired settings and placing them in your GMT user themes directory (usually ~/.gmt/themes) and naming them theme.conf, where theme is any valid string. The GMT_THEME parameter is used to set the current theme. The table below lists the default settings for the classic, modern, and minimal themes.

Default settings for built-in themes

Parameter	Classic	Modern	Minimal
FONT_ANNOT_PRIMARY	12p,Helvetica,black	auto,Helvetica,black	auto,AvantGarde-Book,black
FONT_ANNOT_SECONDARY	14p,Helvetica,black	auto,Helvetica,black	auto,AvantGarde-Book,black
FONT_HEADING	32p,Helvetica,black	auto,Helvetica-Bold,black	auto,AvantGarde-Book,black
FONT_LABEL	16p,Helvetica,black	auto,Helvetica,black	auto,AvantGarde-Book,black
FONT_LOGO	8p,Helvetica,black	auto,Helvetica,black	auto,Helvetica,black
FONT_SUBTITLE	18p,Helvetica,black	auto,Helvetica-Bold,black	auto,AvantGarde-Book,black
FONT_TAG	20p,Helvetica,black	auto,Helvetica,black	auto,AvantGarde-Book,black
FONT_TITLE	24p,Helvetica,black	auto,Helvetica-Bold,black	auto,AvantGarde-Book,black
FORMAT_GEO_MAP	ddd:mm:ss	ddd:mm:ssF	ddd:mm:ss
MAP_ANNOT_MIN_SPACING	0p	auto	auto
MAP_ANNOT_OFFSET_PRIMARY	5p	auto	auto
MAP_ANNOT_OFFSET_SECONDARY	5p	auto	auto
MAP_FRAME_AXES	WESNZ	auto	auto
MAP_FRAME_PEN	thicker,black	auto	auto
MAP_FRAME_TYPE	fancy	fancy	plain
MAP_FRAME_WIDTH	5p	auto	n/a
MAP_GRID_PEN_PRIMARY	default,black	auto	thinner,lightgrey
MAP_GRID_PEN_SECONDARY	thinner,black	auto	thinnest,lightgrey
MAP_HEADING_OFFSET	18p	auto	auto
MAP_LABEL_OFFSET	8p	auto	auto
MAP_POLAR_CAP	85/90	auto	auto
MAP_TICK_LENGTH_PRIMARY	5p/2.5p	auto	auto
MAP_TICK_LENGTH_SECONDARY	15p/3.75p	auto	auto
MAP_TICK_PEN_PRIMARY	default,black	auto	auto
MAP_TICK_PEN_SECONDARY	thinner,black	auto	auto
MAP_TITLE_OFFSET	14p	auto	auto
MAP_VECTOR_SHAPE	0	0.5	0.5