The Generic Mapping Tools (GMT) version 6, released in 2019, introduces a new "modern mode" to complement the existing "classic mode," simplifying GMT scripting and improving science communication. GMT is a cross-platform tool widely used in Earth and ocean sciences for creating high-quality maps and figures. Version 6 defaults to classic mode, making it a recommended upgrade for GMT 5 users, while new users are encouraged to use modern mode for shorter scripts, easier access to global datasets, and enhanced tools for subplots, insets, and animations. GMT 6 includes a new "modern mode" that simplifies scripting by eliminating the need for options like -O, -K, and -P, and automatically handles PostScript to graphic formats. It also provides a more structured workflow, with all scripts running in a temporary directory, and automatically manages region and projection settings. The modern mode also supports new modules like figure, inset, subplot, movie, and events, which simplify the creation of complex illustrations and animations. GMT 6 also includes improved access to remote data sets, allowing users to specify special file names that automatically download and cache data. This feature enables users to access global datasets with ease, including high-resolution digital elevation models (DEMs) and other geospatial data. The article highlights several examples of GMT 6's capabilities, including the creation of a coastline map of Chile, a shaded relief image of Madagascar, four Pacific island DEMs, and an animation of earthquakes. These examples demonstrate the enhanced functionality and ease of use provided by the modern mode. GMT 6 is compatible with both classic and modern modes, with the latter offering a more streamlined and user-friendly experience. The GMT code and documentation are freely accessible, and the software is supported by a community of scientists and enthusiasts. Future developments include improved integration with GDAL and the adoption of PROJ.4 as the future projection library in GMT.The Generic Mapping Tools (GMT) version 6, released in 2019, introduces a new "modern mode" to complement the existing "classic mode," simplifying GMT scripting and improving science communication. GMT is a cross-platform tool widely used in Earth and ocean sciences for creating high-quality maps and figures. Version 6 defaults to classic mode, making it a recommended upgrade for GMT 5 users, while new users are encouraged to use modern mode for shorter scripts, easier access to global datasets, and enhanced tools for subplots, insets, and animations. GMT 6 includes a new "modern mode" that simplifies scripting by eliminating the need for options like -O, -K, and -P, and automatically handles PostScript to graphic formats. It also provides a more structured workflow, with all scripts running in a temporary directory, and automatically manages region and projection settings. The modern mode also supports new modules like figure, inset, subplot, movie, and events, which simplify the creation of complex illustrations and animations. GMT 6 also includes improved access to remote data sets, allowing users to specify special file names that automatically download and cache data. This feature enables users to access global datasets with ease, including high-resolution digital elevation models (DEMs) and other geospatial data. The article highlights several examples of GMT 6's capabilities, including the creation of a coastline map of Chile, a shaded relief image of Madagascar, four Pacific island DEMs, and an animation of earthquakes. These examples demonstrate the enhanced functionality and ease of use provided by the modern mode. GMT 6 is compatible with both classic and modern modes, with the latter offering a more streamlined and user-friendly experience. The GMT code and documentation are freely accessible, and the software is supported by a community of scientists and enthusiasts. Future developments include improved integration with GDAL and the adoption of PROJ.4 as the future projection library in GMT.