Underlining in purple wavy lines (wavy vertical lines may also appear in the margin) Word employs purple wavy vertical lines and underlines in an XML document to highlight XML structure that does not conform to the XML schema connected to the document. These markers are used by Word to notify you that there are problems with the formatting of the text.
In Word, blue squiggly underlines show formatting issues. Some text in a paragraph, for example, may be formatted in a different font size than the remainder of the paragraph (as shown in the image above). Or, some words may be misspelled or not capitalized correctly (shown below with red underlines).
Blue underlines are also used to indicate words that are unknown or unrecognized as words by Microsoft Word. These are often single characters that are displayed immediately after they are typed. For example, the character ✓ is known as a "soft hyphen" and is used to represent a missing word between two letters in an electronic document. It is inserted by pressing the Shift key plus the Soft Hyphen key on the keyboard. To remove a soft hyphen, press the Shift key again.
A yellow underline indicates a spelling error. This can sometimes cause confusion because it looks like someone has proofread your work. But don't worry: Yellow underlining is easy to fix. Just click once to correct the mistake.
Red underlined text indicates a grammatical error. This can also cause confusion because it looks like someone has corrected your writing. Don't worry: Red underlining is easy to fix.
In our papers, Word loves to employ squiggly underlines to signal that things isn't quite right. The most prevalent are red (a possible spelling mistake) and green (a potential grammar error). However, you may have also noticed blue squiggly lines across your text. These are used to indicate an incorrect or missing image.
Underlining is one of those features that seems like a good idea at first, but doesn't work so well in practice. For example, trying to use it as a way of directing the reader's attention to certain parts of your paper will only confuse them. Instead, try using bold or italic type for the same purpose.
How to Remove Blue Squiggly Underlines
Margin refers to the white space strips around the page's edges in a word document. There are two types of margins: internal and external.
Internal margins are the spaces between the pages of your document. When you print out a copy of your document, the printer will only print material within the internal margins. Any content outside this area will not appear in the final copy.
External margins are the spaces along the top and bottom of the page. These margins are visible when you view your document in Microsoft Word or LibreOffice, as well as many other software programs. External margins can be set manually by clicking and dragging to specify new widths, or they can be automatically calculated based on the size of the text inside the document.
When you create a new document, the default setting for both internal and external margins is half of an inch. You can change this value if needed.
Blank space at the edge of a page is called "trim." Trim does not contain any text or graphics, so it cannot be edited like regular text or attached to an object. However, trim may include margins around pictures or other objects placed at the page edge.
Paragraph and page borders appear to be the most difficult lines in Word documents, especially when they have been added by another user or by Word's AutoFormat As You Type function. Border These lines are distinguished by the fact that you may pick them and move them up and down, but you cannot delete them. They can be caused by missing code for inserted images or objects, such as charts, graphs, or tables. When this happens, select the offending image/object and click Delete on the Document Menu.
The rationale is straightforward. Because the "line" is actually a paragraph border, it appears at the bottom of the final paragraph in that style. By hitting Ctrl+A, you may select all of the paragraphs in your manuscript. From the Format option, select Borders and Shading. Select the No Border option for All Paragraphs.
The line you see across the page is a paragraph border that Word added automatically with AutoFormat. Go to Format, Borders and Shading (Word 2002–2003) or click the Border drop-down in the Paragraph section of the Home tab of the Ribbon to remove it (Word 2007 and up).