The pattern itself is set by the pattern attribute. The graphics context attribute font specifies the current text font. The read-only graphics context attribute fwidth gives the width of the widest character of the current text font. The graphics context attribute gamma specifies the amount of color correction applied when converting between Icon color specifications and those of the underlying graphics system. A value of 1.0 results in no color correction.
Larger values produce lighter, less saturated colors.
The write-only canvas attribute image names a file containing an image to be used as the initial contents of a window when it is opened. The canvas attribute label specifies a title used to identify the window. The graphics context attribute leading specifies the vertical spacing of successive lines of text written in a window. The graphics context attribute lines specifies the number of text lines available using the current font. The graphics context attribute linestyle specifies the form of drawn lines.