Very basic question. I am new to QGIS (using v 3.0) and want to make a simple map of research area. I'm using natural earth and I've identified the 10m_admin_0_map_units is the file with the country names. I just want a few country names to appear on the map of the Caribbean e.g. Barbados, Curacao, Cuba, Venezuela, Mexico. But I can't work out how to set up the rule based layer for this and I can't find a tutorial using this version. Could someone explain how I set-up the filter to only get a few country names?