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 (22, 23) 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