In text formatting, what do indents control?

Indents specifically control the spacing at the beginning of a line of text. This means that when an indent is applied, it adjusts the distance from the left or right margin to where the text begins, creating a visual separation that can enhance readability and structure in documents. Indenting is commonly used in various types of writing, such as essays and reports, to signify new paragraphs, quotes, or to organize content.

The other options do not accurately describe the purpose of indents. Text size refers to how large or small the characters appear, color pertains to the hue of the font used in the text, and styling of headers involves formatting options like bolding or italics that are not directly related to how text is positioned in relation to the margins. Hence, indenting plays a crucial role in establishing layout and clarity, primarily through its impact on spacing.