error:
The international “don't” symbol: a circle with a diagonal line across it.
gray75:
75% gray: a checkerboard pattern where three out of four bits are on.
gray50:
50% gray: a checkerboard pattern where every other bit is on.
gray25:
25% gray: a checkerboard pattern where one out of every four bits is on.
gray12:
12.5% gray: a pattern where one-eighth of the bits are on, consisting of every fourth pixel in every other row.
hourglass:
An hourglass symbol.
info:
A large letter “i”.
questhead:
The silhouette of a human head, with a question mark in it.
question:
A large question-mark.
warning:
A large exclamation point.