asymptote: GUI usage
11.2 GUI usage
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A wheel mouse is convenient for raising and lowering objects within
'xasy', to expose the object to be moved. If a wheel mouse is not
available, mouse 'Button-2' can be used to repeatedly lower an object
instead. When run from the command line, 'xasy' accepts a command line
option '-x n', which sets the initial magnification to 'n'.
Deconstruction of compound objects (such as arrows) can be prevented
by enclosing them within the commands
void begingroup(picture pic=currentpicture);
void endgroup(picture pic=currentpicture);
By default, the elements of a picture or frame will be grouped
together on adding them to a picture. However, the elements of a frame
added to another frame are not grouped together by default: their
elements will be individually deconstructed (add).