On the desktop, zoom right in on any map, click on DMS in the toolbar & you should get a popup listing all the maps available for that screen area. There should be a Northern Hemisphere or Western Europe base map among them.
Yebbut - I don't have a map that starts out with anywhere near where I want to capture ?? ... the method you describe does bring up a "Westen Europe" map ... BUT only for the area I'm looking at ..... I want Belgium .... even trying it with Dover in my view it doesn't stretch as far as Belgium.