A sheet processing machine, provided with - a stationary frame, comprising a transport table for transporting and supporting a sheet material, the transport table comprising a roller conveyor comprising a plurality of rollers (18, 20), and a gap between two of the plurality of rollers (18, 20), wherein the transport table has a transportation plane in which plane, in operation, the sheet material is moved, wherein the transportation plane is a substantially horizontal plane so that the sheet material is oriented substantially horizontally; - a processing tool for processing the sheet material and arranged at a first side of the transportation plane, that is above the transportation plane, such that, in operation, the processing tool processes at a first side of the sheet material wherein the first side of the sheet material is an upwardly directed side of the sheet material; characterized in that the sheet processing machine further comprises: - a marking tool for marking the sheet material and arranged at a second side of the transportation plane, that is below the transportation plane, such that, in operation, the marking tool marks at a second side of the sheet material, opposite the first side, wherein the second side of the sheet material is a downwardly directed side of the sheet material; and - a XY-guide assembly arranged in or at the gap at the second side of the transportation plane, that is below the transportation plane, and connecting the marking tool to the stationary frame and enabling a movement of the marking tool with respect to the stationary frame, wherein the marking tool extends upwardly in the gap towards the sheet material and is movable with respect to the stationary frame along a X-direction parallel to a transport direction of the roller conveyor and in a Y-direction perpendicular to the X-direction and parallel to the transportation plane, and wherein the movement of the marking tool with respect to the stationary frame is independently controllable relative to a movement of the processing tool with respect to the stationary frame. - a stationary frame, comprising a transport table for transporting and supporting a sheet material, the transport table comprising a roller conveyor comprising a plurality of rollers (18, 20), and a gap between two of the plurality of rollers (18, 20), wherein the transport table has a transportation plane in which plane, in operation, the sheet material is moved, wherein the transportation plane is a substantially horizontal plane so that the sheet material is oriented substantially horizontally; - a processing tool for processing the sheet material and arranged at a first side of the transportation plane, that is above the transportation plane, such that, in operation, the processing tool processes at a first side of the sheet material wherein the first side of the sheet material is an upwardly directed side of the sheet material; characterized in that the sheet processing machine further comprises: - a marking tool for marking the sheet material and arranged at a second side of the transportation plane, that is below the transportation plane, such that, in operation, the marking tool marks at a second side of the sheet material, opposite the first side, wherein the second side of the sheet material is a downwardly directed side of the sheet material; and - a XY-guide assembly arranged in or at the gap at the second side of the transportation plane, that is below the transportation plane, and connecting the marking tool to the stationary frame and enabling a movement of the marking tool with respect to the stationary frame, wherein the marking tool extends upwardly in the gap towards the sheet material and is movable with respect to the stationary frame along a X-direction parallel to a transport direction of the roller conveyor and in a Y-direction perpendicular to the X-direction and parallel to the transportation plane, and wherein the movement of the marking tool with respect to the stationary frame is independently controllable relative to a movement of the processing tool with respect to the stationary frame. - a marking tool for marking the sheet material and arranged at a second side of the transportation plane, that is below the transportation plane, such that, in operation, the marking tool marks at a second side of the sheet material, opposite the first side, wherein the second side of the sheet material is a downwardly directed side of the sheet material; and - a XY-guide assembly arranged in or at the gap at the second side of the transportation plane, that is below the transportation plane, and connecting the marking tool to the stationary frame and enabling a movement of the marking tool with respect to the stationary frame,