Spectral parameters from RXTE monitoring observations of GRS1758−258: flux in keV s⁻¹ cm⁻² in the 3–10 keV and 10–20 keV bands, fitted to the spectra, spectral hardness (10–20 keV/3–5 keV) calculated with fluxes in keV s⁻¹ cm⁻², photon index, temperature, and normalization of the disk component, total flux of the additional iron line in 10⁻³ ph s⁻¹ cm⁻² and the reduced χ². Soft states are highlighted for episodes reaching a photon index greater than 2.