Is it possible to specify a coordinate reference system (CRS) for the scalebar that is different to the project CRS?
For example, my project CRS uses geographic coordinates (lat/long), the reason being that I need a lat/long graticule on the map. However I would like the scalebar to be expressed in kilometres (i.e. projected distance units, rather than angular measures).
An alternative solution would be for QGIS to have the capability to specify the CRS of the map grid / graticule, as in ArcMap.
This is not simply a question about how to select scalebar units (e.g. miles / kilometres / metres).