What are hidden characters?

What you’ve done is turn on one of the *over-priced* software’s most useful features: hidden characters.

The backstage crew, if you will, is invisible but often invaluable, especially if/when something goes wrong. In revealing hidden characters, you also reveal the structural framework of your text. Whilst they don’t print, export, or appear in your final PDF, they show you exactly how InDesign is interpreting the content on your page and, vice versa, how the content is instructing the software.

The most common (and distinctive) glyph is the paragraph mark, or Pilcrow, (¶), which is the container for paragraph-level formatting and appears every time you press Return. Alignment, spacing before and after, indents, rules, and paragraph styles are all attached to this invisible endpoint. Delete a paragraph mark, and you’re both removing a line break and, potentially, getting rid of a chunk of formatting infrastructure too. Equally common and found between words, InDesign displays spaces as small centred dots (·). These reveal whether text contains single spaces, multiple spaces, or inconsistent spacing.

Tabs appear as right-pointing double angle quotation marks (»). Every tab character acts as a placeholder that jumps to the next tab stop. Unlike spaces, tabs are dynamic, meaning they can be changed in the tab settings and the text automatically repositions itself. This makes them particularly useful for lists, menus, contents pages and any layout requiring consistent alignment. They can also explain why some of your text is sitting funny… because there was a tab there the whole time.

Line breaks, created with Shift + Return, appear as bent arrows (↵). They force text onto a new line without creating a new paragraph, so the line remains attached to the paragraph above, inheriting its formatting and spacing rules. Crucial for proper typesetting.

What makes hidden characters so useful is that they expose the logic behind both your layout and InDesign itself. Every dot (·), arrow (»), line break (↵) and paragraph mark (¶) marks a decision about how text behaves and looks, revealing the distinction between content and formatting. All of these common hidden characters are strong instructions that tell text (and you, as the designer) exactly what text is doing and where it’s flowing. Rather than relying on trial and error, these characters explicitly direct InDesign’s text engine, helping maintain consistency when layouts evolve. Most of the time, you’ll switch them on to solve a problem. But the longer you work in InDesign, the more they become a way of reading a document’s architecture.