Here are the major marks Microsoft Word displays with the Show All option on.
Paragraph Mark, the symbol is called a Pilcrow. It’s the symbol used for the ‘Show All’ button on the Home tab.
Line Break, angled arrow pointing left.
Tab, a right pointing arrow
Space, a dot in the middle of the line
Hidden Text, dots under the text.
Optional hyphen, line with bend at end.
The different types of breaks in Word get labelled except the Text Wrapping break.
Column Break and Page Break
Whether it’s a manual paragraph setting or style setting, a page break appears as finely dotted line when Show All is on.
No text explains that the dotted line is a page break, let alone what causes the page break. You need to check the direct paragraph or style to find the cause.
Section Breaks are hidden divisions between parts of a document. They can be continuous or force a new page, a new Even numbered page or a new Odd numbered page.