A roof window arrangement comprising a roof window with a stationary frame and a sash carrying a pane , in which the sash includes at least a top member defining a width of the sash, two mutually parallel side members defining a length of the sash, and a bottom member parallel to the top member , and is connected to the stationary frame by means of a set of hinges and configured to assume at least an open position and a closed position by rotation about a hinge axis substantially parallel to the top member of the sash , and a manual operating assembly configured to assist in operation of the sash between the open and the closed positions, said manual operating assembly including a handle portion located at the top member of the sash and having a longitudinal extension substantially in parallel with the top member of the sash , said roof window arrangement comprising at least one appliance member connected to the handle portion of the manual operating assembly , wherein the handle portion (41; 141; 341), or at least one of the handle portions , of the manual operating assembly comprises receiving means configured to receive at least one exchangeable appliance member in a releasable connection, characterised in that the receiving means comprise a recess or cut-out (412; 1412) in the handle portion (41; 141; 241a; 341) such that the appliance member is located at a face of the handle portion and at a position which is immediately visible to the user and thus coincides with a line of vision of the user when standing in front of the roof window, and that the at least one exchangeable appliance member is selected from a list of: a dummy element covering the recess or cut-out; a sensor unit for temperature, relative humidity, air quality, etc. a remote control unit configured to cooperate with an electrical operating assembly and/or a screening assembly and/or accessory devices; and an information unit including a status indicator, a watch, etc the handle portion (41; 141; 341), or at least one of the handle portions , of the manual operating assembly comprises receiving means configured to receive at least one exchangeable appliance member in a releasable connection, characterised in that the receiving means comprise a recess or cut-out (412; 1412) in the handle portion (41; 141; 241a; 341) such that the appliance member is located at a face of the handle portion and at a position which is immediately visible to the user and thus coincides with a line of vision of the user when standing in front of the roof window, and that the at least one exchangeable appliance member is selected from a list of: a dummy element covering the recess or cut-out; a sensor unit for temperature, relative humidity, air quality, etc. a remote control unit configured to cooperate with an electrical operating assembly and/or a screening assembly and/or accessory devices; and an information unit including a status indicator, a watch, etc a dummy element covering the recess or cut-out; a sensor unit for temperature, relative humidity, air quality, etc. a remote control unit configured to cooperate with an electrical operating assembly and/or a screening assembly and/or accessory devices; and an information unit including a status indicator, a watch, etc <EOS>