The values held in PTS are set by the SETPoints command, followed by point specifications in which each p‑point identifier is preceded by ‘P’ or ‘T’, e.g. P1 P2 T3 P4. When the P-point is preceded by P it is treated in the same way as a point element (POINT) in the Design Data; when preceded by a T it is treated in the same way as a tangent point element (TANP) in the Design Data. (See the MODEL Reference Manual for further details).