A screening arrangement for adjusting the light intake of a window and comprising: an extensible screen having a predefined length between a first end portion and a second end portion, the extensible screen being made from a material with variable permeability in at least a first direction such that when traction is applied to the material in said first direction, the permeability of the material is increased, the extensible screen defining a maximum stretched length, a roller shaft connected to drive means, the first end portion of the extensible screen being connected to the roller shaft, the extensible screen being wound on the roller shaft in a non-screening position and configured to be unwound from the roller shaft under rotation of the roller shaft in an unwinding direction, to a deployed position at a well-defined end stop, and traction means configured to apply a traction force on the extensible screen to bring the extensible screen to a first stretched state in which the permeability of the material is increased, in which the traction means is configured to maintain the extensible screen in the first stretched state during unwinding of the extensible screen until the well-defined end stop has been reached, corresponding to a first screening position, and in which the extensible screen is brought to a second screening position in which the extensible screen is in a second stretched state by continued rotation of the roller shaft in the unwinding direction, the permeability of the extensible screen being decreased in said second stretched state relative to said first stretched state, characterised in that the traction means comprises a cord system including at least one traction cord having a first end in connection with the roller shaft and a second end in connection with the second end portion of the extensible screen, and a spring device (5; 50) to provide pre-tensioning of the at least one traction cord, the cord system being configured to apply a traction force on the extensible screen such that the tension exerted by the cord system on the extensible screen provides said first stretched state during unwinding of the extensible screen. an extensible screen having a predefined length between a first end portion and a second end portion, the extensible screen being made from a material with variable permeability in at least a first direction such that when traction is applied to the material in said first direction, the permeability of the material is increased, the extensible screen defining a maximum stretched length, a roller shaft connected to drive means, the first end portion of the extensible screen being connected to the roller shaft, the extensible screen being wound on the roller shaft in a non-screening position and configured to be unwound from the roller shaft under rotation of the roller shaft in an unwinding direction, to a deployed position at a well-defined end stop, and traction means configured to apply a traction force on the extensible screen to bring the extensible screen to a first stretched state in which the permeability of the material is increased, in which the traction means is configured to maintain the extensible screen in the first stretched state during unwinding of the extensible screen until the well-defined end stop has been reached, corresponding to a first screening position, and in which the extensible screen is brought to a second screening position in which the extensible screen is in a second stretched state by continued rotation of the roller shaft in the unwinding direction, the permeability of the extensible screen being decreased in said second stretched state relative to said first stretched state, characterised in that the traction means comprises a cord system including at least one traction cord having a first end in connection with the roller shaft and a second end in connection with the second end portion of the extensible screen, and a spring device (5; 50) to provide pre-tensioning of the at least one traction cord, the cord system being configured to apply a traction force on the extensible screen such that the tension exerted by the cord system on the extensible screen provides said first stretched state during unwinding of the extensible screen.