If the num_of_lines parameter is not given then the legend frame will display as many lines as number of categories in the map, otherwise, it will display the first num_of_lines minus 1 categories with the rest being truncated.
The user may adjust the num_of_lines parameter or the size of graphics window to get an appropriate result.
The user may specify a second raster map with the rast parameter from which the legend is generated. This is useful to visualize (time) series of raster maps with a common static legend instead of the default dynamic legend.
To remove all frames when clearing the display, use "d.erase -f".
g.region rast=landclass96 -p d.rast.leg landclass96
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