My initial layer is an OS tif file, with its associated tfw. I can zoom into the area I want, no problem. The CRS is OS 1936 (and that's the project CRS as well).
I download a 'track' layer from an Etrex as a GPX file: I make sure the CRS is OS 1936. If I select this and zoom to the layer extent I can see it.
But I cannot see both layers at once (that is, overlaid) - although I achieved this with another similar dataset yesterday.
I'm obviously doing something wrong which I suspect is really very basic - can anyone tell me what?