Should you need to use the same style across different parts of your document, Google Docs lets you copy formatting from text, cells, or an object with the Paint Format tool. Here’s how to copy and paste formatting in Docs.
Use Paint Format in Docs
Fire up your browser, head to Google Docs, and open a document.
Highlight the text you want to copy the format of, and then click on the “Paint Format” icon in the toolbar.
After it’s enabled, your cursor turns into a paint roller to show you the format was copied. Highlight the text you want to apply the format to and watch the magic happen.
If you have more than one section that you want to paste a format to, double-click the “Paint Format” icon to lock it. You can then use the tool repeatedly without clicking it again.
You can also use Paint Format with keyboard shortcuts. To copy a format, press Ctrl+Alt+C (Windows or Chrome OS) or Command+Option+C (Mac). To paste, press Ctrl+Alt+V (Windows or Chrome OS) or Command+Option+V (Mac).
Use Paint Format in Slides
The Paint Format tool can be used in Google Slides to copy the format of pictures across multiple slides.
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Source: How-To Geek