Control apparatus for positioning a blind or a roller blind, having a preset unit which has an adjusting device which can be used to adjust, as operating modes of a main adjusting range, the upper end position of the blind/roller blind, the lower end position of the blind/roller blind and any desired intermediate positions (Z1...Z7) of the blind/roller blind, these values (OE, UE, Z1...Z7) being converted into desired value signals by means of a converter, and a comparison device forming a travel distance signal on the basis of the desired value signal and an actual value signal corresponding to the current position of the blind/roller blind and supplying it to an actuation unit for the blind/roller blind, wherein • in addition to these operating modes of the main adjusting range, at least one first operating mode of a special function range can be additionally adjusted using the same adjusting device, • a first memory for storing a first memory value for a desired position of the blind/roller blind is provided for a first operating mode in the special function range, • upon adjusting the adjusting device to this first memory value, the preset device outputs an activation signal to this first memory, whereupon the latter outputs the permanently preset stored first memory value to the converter which accordingly converts it into a desired value signal to be passed to the comparator, and wherein • a second memory for storing a second memory value for a desired actuation time, at which a desired position of the blind/roller blind is to be approached, is provided for a second operating mode in the special function range, characterized • in that, upon adjusting the adjusting device to this second memory value, the preset device outputs an activation signal to the second memory, whereupon the latter outputs the permanently preset stored second memory value to a comparator which is connected, on the other hand, to a timer which indicates the current time, and • in that the comparator activates the first memory as soon as it determines a match between the current time and the second memory value, whereupon it outputs the permanently preset stored first memory value to the converter. • in addition to these operating modes of the main adjusting range, at least one first operating mode of a special function range can be additionally adjusted using the same adjusting device, • a first memory for storing a first memory value for a desired position of the blind/roller blind is provided for a first operating mode in the special function range, • upon adjusting the adjusting device to this first memory value, the preset device outputs an activation signal to this first memory, whereupon the latter outputs the permanently preset stored first memory value to the converter which accordingly converts it into a desired value signal to be passed to the comparator, and wherein • a second memory for storing a second memory value for a desired actuation time, at which a desired position of the blind/roller blind is to be approached, is provided for a second operating mode in the special function range, characterized • in that, upon adjusting the adjusting device to this second memory value, the preset device outputs an activation signal to the second memory, whereupon the latter outputs the permanently preset stored second memory value to a comparator which is connected, on the other hand, to a timer which indicates the current time, and • in that the comparator activates the first memory as soon as it determines a match between the current time and the second memory value, whereupon it outputs the permanently preset stored first memory value to the converter.