Double Spacing in Google Docs Every Way That Actually Works

The Five-Second Keyboard Shortcut
The fastest way to double space any selection in Google Docs is Ctrl+5 on Windows or Cmd+5 on Mac. Highlight the text you want to reformat, press the shortcut, and the line spacing snaps to 2.0 instantly. If you need to toggle back to single spacing, press Ctrl+0 (Cmd+0). There is no dialog box, no menu diving, no confirmation prompt. You select, you tap two keys, you move on.
The reason this shortcut exists in both Word and Google Docs is that double spacing has been the academic standard for decades, and anyone writing a thesis or submitting a manuscript needs it at their fingertips. If you work with documents regularly, building the Ctrl+5 habit into your muscle memory saves real minutes every week. You can also use Ctrl+4 (Cmd+4) to jump straight to 1.5 spacing, which is the most common business-document setting.
One detail people miss: the shortcut applies only to whatever text you have selected. If nothing is highlighted, it still works on your current paragraph. But if you meant to double space the entire document and you accidentally select a single sentence, you will get one oddly spaced line buried in an otherwise single-spaced page. Select all with Ctrl+A (Cmd+A) before pressing the shortcut when the whole document needs changing.
Using the Format Menu for Precise Control
If you prefer clicking or need a spacing value that is not one of the standard presets, go to Format in the top menu bar, then Line spacing. You will see a dropdown with five options: Single (1.0), 1.15, 1.5, Double (2.0), and Custom line height. Choosing Double gives you exactly 2.0, which is what most writing assignments and legal draft templates call for.
The Custom line height option opens a small field where you can type any value between 0.5 and 8.0. This is useful when a client or style guide specifies something like 1.3 or 1.7 spacing, which none of the presets cover. You can also set Before and After paragraph spacing in the same panel, which controls the gap between paragraphs rather than the distance between lines within a paragraph. Confusing those two settings is one of the most common formatting errors we see in business documents.
There is also a line-spacing icon in the toolbar, usually represented by three horizontal lines with an up-and-down arrow next to it. Clicking it opens the same dropdown without going through the Format menu. If your toolbar is crowded and you cannot find it, the Format menu path is always reliable and never gets hidden.

Making Double Spacing Your Document Default
If you write double-spaced documents regularly, you do not want to remember to apply the setting every time you start a new file. Go to Format, then Document defaults at the bottom of that menu. In the dialog that appears, set Line spacing to Double (or your preferred value), click OK, and from then on every new Google Doc you create will open with that spacing already applied.
This matters most when you are building templates. A law firm preparing a standard engagement letter, a small marketing agency drafting client proposals, a freelance writer delivering manuscript drafts: all of them benefit from setting the spacing once at the template level rather than correcting it on every document. The default sticks to the account and the Google Docs environment, so your team members who use the same workspace inherit the same starting point.
A practical tip: after you set your default, create a test document to confirm it took. Then delete the test file. If you ever need to revert, go back into Document defaults and change the line spacing to Single. The setting is per-account, not per-file, so changing it affects all future documents, not ones already saved.
Double Versus 1.5 Versus Custom Spacing
Double spacing (2.0) is the standard for academic manuscripts, legal filings in draft form, and any document where a reviewer will add margin comments between lines. It gives the reader breathing room and makes edits visible. If your professor, editor, or opposing counsel specified double spacing, that is non-negotiable and you should use exactly 2.0 rather than 1.5 or any other value.
For most business documents, 1.5 spacing hits a sweet spot between readability and compactness. Proposals, internal memos, meeting notes, and client-facing reports often look more polished at 1.5 than at 2.0, which can make a two-page summary stretch to four pages and dilute the message. Single spacing is fine for dense reference material like price lists, technical specifications, or appendices where scannability matters more than flow.
Where people get tripped up is mixing these within one document without intent. A cover letter at single spacing followed by a body at double spacing looks like a formatting accident rather than a design choice. Pick your base spacing, apply it consistently, and use paragraph spacing (the Before/After values in the line-spacing panel) to create visual breaks between sections instead of relying on extra blank lines or inconsistent line heights.
Common Mistakes That Break Your Spacing
The most frequent error is pasting text from a website, an email, or a PDF into Google Docs and watching the spacing go haywire. Pasted content often carries its own line-height values, paragraph indents, and even hidden extra line breaks that override your document's settings. The fix is to paste as plain text first: use Edit > Paste (or Ctrl+Shift+V on Windows) to strip all inherited formatting, then reapply your spacing cleanly.
Another recurring problem is confusing line spacing with paragraph spacing. If you double the line spacing and the gaps between paragraphs look enormous, that is because the Before/After paragraph spacing is stacking on top of the increased line height. Go into Format > Line spacing and reduce or zero out the Before and After values for the paragraph style you are using. The lines within a paragraph will still be comfortably spaced, but the jumps between paragraphs will no longer feel like chasms.
Finally, be aware that Google Docs renders spacing slightly differently depending on your zoom level and screen resolution. What looks perfectly double-spaced at 100 percent zoom may look tighter or looser at 75 or 125 percent. Before you send a document for review, set your zoom to 100 percent and scroll through the full page. If you are exporting to PDF, do one final check in the PDF viewer, because font rendering can shift line metrics by a pixel or two across different systems.