Manifestation for glass is the name given for regulation decals that meet with the Disability Discrimination Act (DDA). People with visual impairment should be made aware of any glass locations, especially for doors within the glazing due to the leading edge.
By law, manifestation must be seen on glass doors and partitions at two heights. The lower level being between 850 – 1000mm from Finished Floor Level (FFL) and the upper being between 1400 – 1600mm FFL.
The full Document M report can be found here.