Because of the multi-window and directory capabilities, the CLEAR
command has many possible arguments.
- CLEAR ALPHA erases the alphanumeric screen alone, without
affecting the plot. If possible, rather than erasing the alpha screen,
the graphic screen (current window) is raised up.
- CLEAR DIRECTORY [DirName] makes the named directory (or by
default the current directory) invisible. All the attached structure
becomes invisible.
- CLEAR GRAPHIC lowers the graphic windows, popping up the alpha
screen.
- CLEAR PLOT is equivalent to either CLEAR TREE or CLEAR WHOLE, depending on user preference as expressed in command
CHANGE CLEAR.
- CLEAR SEGMENT destroys the last graphic segment, i.e. the part
of the plot corresponding to the last graphic command. Can be used
repetitively.
- CLEAR SEGMENT SegName makes the named segment invisible.
This is equivalent to CHANGE VISIBILITY NameSeg OFF.
- CLEAR TREE deletes the current directory, that is all
subdirectories descending from the current main directory. Other parallel
trees (if any) are not destroyed.
- CLEAR WHOLE deletes the whole plot, all main directories and
their subdirectories. A new (empty) main directory is automatically
recreated with one associated window.
- CLEAR WINDOW delete the current graphic window. Beware that
this may leave the plot with no associated window.
