I have a print composition with three maps:
- a general map (1),
- a medium-scale map (2)
- and my detailed map (0).
I want a box showing the extend of map0, in map2.
For doing that I block the layer in map0 and then go to map2 and create a new Overview. Then I select map0 as Map Frame, but nothing happens; no extent frame is shown.
I've tried redrawing the map, also tried with different blending modes. I did it a couple of months ago, with QGIS2.6.
Could it be a bug of the new version?