Further to the Variants functionality detailed in this Article one can also set the values that define or identify the variables up-front. This could be done in the form of a Region selector (or Product or other Master Data selectors) or a similar example, the functionality is relatively flexible. The steps to do so are laid out below:

When the relevant drill down is clicked on by the viewer the navigation that follows (see this Article for more insight) will retain that selection, in the example this means any Variants identified for the USA will be automatically shown, until the browser cache is cleared (closing the tab for example) or the selector is used again.