when I open "Derived" part in the table, gained by using "Identify features" on a polygon, I see two "Area" types.

One is Cartesian and another is in a EPSG projection.

EPSG projection does not match the one of my project. Is there a way I can change this or control it better?

  • Does it match the projection of the layer? – TeddyTedTed Feb 22 at 11:36
  • no, in layer -source-geometry i see other projection. (propertie-source-geometry). – Marin Mirošević Feb 22 at 11:43

It should be the CRS defined for the measurments.

Go to the menu project / properties on the general tab

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