NOTES ON DRAWING RULES PROGRAMME v1.00
By D Griffiths march 2006
This is a provisional version and hope to add to this programme with practical examples and some user interaction. Comments and suggestions  welcome.
The descriptions are sketchy and suggestions welcome to improve them.

The subject is difficult to explain as you are dealing with binary, logic, truth tables and colour perception. It is difficult to avoid information overload.
In a lot of cases the actual resulting colour is the compliment.
blue - yellow
red - cyan
green - pink (magenta)
white - black
Drawing rules work on individual bits of the colours and not on the overall colour.
The terms "inverse" , "compliment , "not" and "negative" are identical in terms of this topic.
dec 128 binary 10000000 and dec 127 binary 01111111 are the inverse of each other and there behaviour is can be totally different, although the colours they represent appear identical.
I have numbered the rules 1 to 16 in the order they appear in help topics, Microsofts numbering is different.
Left click to move through screens!
If nothing appears to get drawn that is because of the rule.
It starts at rule 5 through to 16 then covers rules 1 to 4 which are boring?  