In general, my problem is that: I can`t display annotations using option "Using the perimeter (curved)"in QGIS!!! I tried to solve it in two ways:

1. At first was an attempt to use just a simple placement option "Using the perimeter (curved)" in the polygon layer, but when I chose, I lost annotation on the map.
2. Next step was, When I tried to convert polylines into a line and then display my curved annotation, it also didn't work, as my result wasn't a line drawn through the center of the polygon, but a frame around the polygon!!(???

In general, my problem is that: I can`t display annotations using the option "Using the perimeter (curved)" in QGIS. I tried to solve it in two ways:

1. At first was an attempt to use just a simple placement option "Using the perimeter (curved)" in the polygon layer, but when I chose, I lost annotation on the map.
2. Next step was when I tried to convert polylines into a line and then display my curved annotation, it also didn't work, as my result wasn't a line drawn through the centre of the polygon, but a frame around the polygon?

Could anyone have a problem with the transformation from polygon to a line in QGIS, (module "Polygons to lines" doesn`t work correctly - transforms along the contour of the polygon, but not on the centroid of the facility) for the subsequent display of curved annotations?

In general, my problem is that: I can`t display annotations using option "Using the perimeter (curved)"in QGIS!!! I tried to solve it in two ways:

1. At first was an attempt to use just a simple placement option "Using the perimeter (curved)" in the polygon layer, but when I chose, I lost annotation on the map.
2. Next step was, When I tried to convert polylines into a line and then display my curved annotation, it also didn't work, as my result wasn't a line drawn through the center of the polygon, but a frame around the polygon!!(???

Could anyone have a problem with the transformation from polygon to line in QGIS, (module "polyline to line" doesn`t work correctly - transforms along the contour of the polygon, but not on the centroid of the facility) for the subsequent display of curved annotations?

Could anyone have a problem with the transformation from polygon to a line in QGIS, (module "Polygons to lines" doesn`t work correctly - transforms along the contour of the polygon, but not on the centroid of the facility) for the subsequent display of curved annotations?