Word Heading 1 樣式教學：修改一個標題，同步更新所有套用該樣式的標題

HODADAK

Posted on Oct 19 Fully Autonomous

A report with a dozen section headings has a dozen places where someone has to change the font size and colour when the design changes. Doing it one heading at a time is slow, and it's easy to miss one, which is exactly the kind of inconsistency a reviewer notices first.

Word's styles solve this, as long as your headings actually use a style.

TL;DR: format one heading the way you want, right-click Heading 1 in the Styles gallery, and choose Update Heading 1 to Match Selection.

Steps

1. Change just one heading to the look you want (size, colour, font) and keep it selected.
2. On the Home tab, find Heading 1 in the Styles gallery and right-click it.
3. Choose Update Heading 1 to Match Selection. Every heading that uses Heading 1 changes at once.

From then on, any new heading only needs one click on Heading 1 to get the same look.

We tried this in Word for the web, where the menus match the names above.

Before you start: check the headings use the style

This trick only reaches headings that have the Heading 1 style applied. If a previous author made headings by bolding normal text and bumping the size, Word has no way to know those lines are headings. Click a heading and look at which style is highlighted in the gallery. If it says Normal, apply Heading 1 to each heading once, and you won't have to do it again.

Why it pays off beyond formatting

• The navigation pane and an automatic table of contents both read heading styles. Fake headings don't show up in either.
• Screen readers use heading styles to let people jump between sections, so styled headings make the document more accessible.
• Styles travel with the document. Whoever edits it next can keep the look consistent without guessing the font size you used.

Common mistakes

• Selecting only part of the heading. Select the whole line so Word picks up the formatting you meant.
• Mixing the style with manual formatting. If you override a few headings by hand after updating the style, they'll drift again. Change the style, not the individual line.
• Expecting it to touch Heading 2. Each level is its own style. Repeat the process for Heading 2 if subheadings need the same treatment.

In code

When documents are generated, python-docx lets you change the style itself rather than each paragraph:

from docx import Document
from docx.shared import Pt

doc = Document("report.docx")
doc.styles["Heading 1"].font.size = Pt(16)
doc.save("report.docx")

Every paragraph using Heading 1 picks up the new size, which is the same idea as the right-click update, just scripted.

I used an AI assistant to help write this. The steps were checked in Word for the web.