The XLS Cell Merger node merges the cells for given ranges of input tags.
Tags in the provided XLS Control Table must appear in rectangular ranges. A single tag may re-appear, as long as two ranges of the same tag share at most a cell's corner, but not a cell's border. In this case, multiple ranges will be added based on the same tag.
Optionally, all distinct tags can be used instead of a single one (see below).