A device for affixing to a surface, referred to as the surface to be marked, one or more assemblies, referred to as the marking assemblies (2, 2'), each comprising at least one adhesive film (3, 3', 3"), each marking assembly (2, 2') being intended to be applied to an area, referred to as the area to be marked (4, 4'), of the surface to be marked, the device comprising: - at least one fixing means (6, 6') configured to fix the device to the surface to be marked, - a sheet, referred to as the frame sheet, and - one or more means, referred to as the laying means (7, 7'), each laying means (7, 7') being configured to apply a marking assembly (2, 2') comprising at least one adhesive film (3, 3', 3") to an area to be marked (4, 4') and comprising: - a portion, referred to as the protection portion (8, 8'), configured to cover the area to be marked (4, 4') when attaching the device to the surface to be marked, and - a portion, referred to as the application portion (9, 9'), comprising: - a portion, referred to as the support portion (10, 10'), part of which, referred to as the free part (12, 12') of the support portion, is separate or detachable from the frame sheet, and - the marking assembly (2, 2'), wherein: - the marking assembly (2, 2') is sandwiched between the free part (12, 12') of the support portion and the protective portion (8, 8') so that the face of the marking assembly (2, 2') which is intended to be applied to the area to be marked (4, 4') is in contact with the protective portion (8, 8') and - the application portion (9, 9') is detachable from the protection portion (8, 8'). - at least one fixing means (6, 6') configured to fix the device to the surface to be marked, - a sheet, referred to as the frame sheet, and - one or more means, referred to as the laying means (7, 7'), each laying means (7, 7') being configured to apply a marking assembly (2, 2') comprising at least one adhesive film (3, 3', 3") to an area to be marked (4, 4') and comprising: - a portion, referred to as the protection portion (8, 8'), configured to cover the area to be marked (4, 4') when attaching the device to the surface to be marked, and - a portion, referred to as the application portion (9, 9'), comprising: - a portion, referred to as the support portion (10, 10'), part of which, referred to as the free part (12, 12') of the support portion, is separate or detachable from the frame sheet, and - the marking assembly (2, 2'), - a portion, referred to as the protection portion (8, 8'), configured to cover the area to be marked (4, 4') when attaching the device to the surface to be marked, and - a portion, referred to as the application portion (9, 9'), comprising: - a portion, referred to as the support portion (10, 10'), part of which, referred to as the free part (12, 12') of the support portion, is separate or detachable from the frame sheet, and - the marking assembly (2, 2'), - a portion, referred to as the support portion (10, 10'), part of which, referred to as the free part (12, 12') of the support portion, is separate or detachable from the frame sheet, and - the marking assembly (2, 2'), - the marking assembly (2, 2') is sandwiched between the free part (12, 12') of the support portion and the protective portion (8, 8') so that the face of the marking assembly (2, 2') which is intended to be applied to the area to be marked (4, 4') is in contact with the protective portion (8, 8') and - the application portion (9, 9') is detachable from the protection portion (8, 8').