Documents with white space in the margins and between paragraphs are the easiest to read. Text that is justified and aligned on both the right and left margins might make a document difficult to read. The terms "justified text" and "centered text" refer to the same text type. Both styles are equally acceptable.
Text that is left-aligned (not common) or right-aligned (even less common) is called "tightly spaced text." These types of texts are difficult to read because there is not much room between the words or between each word and the margin. They are used when space is at a premium.
Tightly spaced text should be avoided if possible. It is easier to read regular-spaced text where there is plenty of space between each word and the margin. This style of writing allows you to express yourself clearly without using too many words or leaving out important details.
Regular-spaced text is used when accuracy is important. For example, a dictionary defines a word as regularly spaced text. Because we want to use accurate definitions, we choose this style of writing.
Now that we know how to write accurately, let's see how to write effectively.
Many short authors employ completely justified text, which aligns with the left and right margins. Left-justified text is simpler to read when created by a word processor (e.g., Word or WordPerfect) rather than professionally typeset text because it prevents awkward gaps between words. Poorly done, left-justified text can cause eye strain and reading fatigue. However, if you create your own text then it's up to you how you want to align your paragraphs.
When comparing left-aligned vs justified text, the main difference is that left-aligned text requires more inter-word spacing, while justified text requires less. Therefore, left-aligned text is harder to read for those who like their texts to have little space in-between words. However, for those who prefer their texts to be well spaced out, left-aligned text is the preferred choice.
In terms of accuracy, there is no real advantage for one type of alignment over another. They both result in aligned text lines that look exactly the same as those typed by a properly configured typewriter. As you can see, there are advantages and disadvantages to each method of text alignment that depend on personal preference and the needs of the reader at a particular moment.
Alignment. The position of text in a document or on a screen, whether in the center, to the left, or to the right, is equally crucial and may have a significant influence on readability. In general, the strongest alignment for text is left-aligned. Left alignment is effective because it corresponds to how you read—from left to right. And since most people read from left to right, this type of alignment will help them understand the content better.
The weakest alignment is right alignment. This type of alignment serves only to divide words into equal-sized segments. It has no other purpose than to make reading text easier by dividing it into sections. However, since people read from left to right, this type of alignment will confuse readers who expect to find information across the entire page.
In general, text that is aligned to the left of its container looks best. If there is not enough space to the left of the text, then the end result is confusing. Readers do not know where one word ends and another begins. This type of alignment is strongest for short pieces of text such as headlines or subheads.
Text that is aligned to the right of its container looks worst. If there is not enough room to the right of the text, then the end result is also confusing. Readers do not know where one word stops and another starts. This type of alignment is strongest for long passages of text such as essays or reports.