Poetry is an art of engineering. Every word you think counts. Well, there are so many aspects in this fabulous engineering. To start with we shall see the importance of Legibility.
Legibility Engineering
Anything which is friendly to the human eye, is Legible.
So, what makes something friendly to our sensitive eyes ?
APPEARANCE
Yes, Appearance is the most important aspect. Better the appearance, greater the intimacy in friendship
So, what all counts under this appearance ?
COLOR
Be it for the background or font, color matters a lot. Color is like the face of a woman. Yes, it is the first thing you see. You would want it to be prominent, appealing to the eye. Say, you have a dark background and writing on it with a light colored font is common sense. The same is when you have the fonts in dark color for a light colored background.
Dark blue or dark violet text written on a black background gives an impression that you would have preferred your words hidden than let them be viewed by the readers. The same is the case when text is written in light yellow or cream on a white background. When blue is written on a dark pink background, it reveal the writer's intention to hurt the reader. Yes, it hurts and it is obvious.
Look at the blocks with alphabets above. Aren't they legible ? Consider the blocks as individual pages with typical color. It wont hurt much and aren't they reader friendly ?
It is simple, think a minute and choose your font color for the appropriate background.
FONT
Luckily, not all of us are allowed to choose the font face. If allowed to, I won't be shocked to see some strange figures instead of words by use Wingdings font or something else. However, people do miss out the criteria of upper case and lower case. There is a strict protocol, as to begin the sentence with an upper case with a series of characters in lower case. Do avoid the mixture of both cases and when you rather prefer to mix and present a poem, it loses its seriousness and earns a clumsy name. Some are also seen writing the entire context with upper case, whatever be their intentions but it helps them no way, as it appears to strain the reader and he prefers not to read.
Fonts are like jewels you add to a woman. Be selective, choose what you feel might appeal the best.
Hope this in some way helps you to understand what is Legibility engineering. There are other aspects like curves and slants, bold and italics. They are decent enough not to spoil the presentation, however they may be used. Except, avoid a long underline as they may again seem irritating and fail to serve the purpose, if you had aimed at highlighting. Take care to leave enough space, let the reader breathe when and where required.
We shall discuss the other aspects of Engineering Poetry in the coming weeks. Have a lovely time until then.
Poetry is nearer to vital truth than history. ~~ Plato, Ion
Adding your comment:
While math is strict and accurate(defined), poetry can be either structured(using a form such as triolet, Lira, Pantoum, Rictameter, etc.) or formless(just a free verse, perchance)i.e., not strictly structured. Engineering Poetry is a beautiful term and I love to think of it as the marriage of two professions - engineering and poetry! 
You have so beautifully touched upon several aspects of Legibility Engineering. I was delighted to see the coloured blocks with ALL POETRY written 
