On word, only able to do double spacing between lines. How to change to single spacing.

Follow https://support.microsoft.com/en-us/office/change-the-line-spacing-in-word-04ada056-b8ef-4b84-87dd-5d7c28a85712

You can control the vertical space between the lines of text in your document by setting the line spacing. Or, you can change the vertical space between paragraphs in your document by setting the spacing before or spacing after paragraphs. You can also choose to keep lines of text together or keep paragraphs together on a page.

Change the line spacing in an entire document

Go to Design > Paragraph Spacing.

Choose an option. To single space your document, select No Paragraph Space.

To return to the original settings later, go to Design > Paragraph Spacing and choose the option under Style Set. This may be Default or the name of style you're currently using.

Change the line spacing in a portion of the document

1. Select one or more paragraphs to update. Press Ctrl + A to select all.
2. Go to Home > Line and Paragraph Spacing .
3. Select Line Spacing Options and choose an option in the Line spacing box.
4. Adjust the Before and After settings to change spacing between paragraphs.
5. Select OK.You can control the vertical space between the lines of text in your document by setting the line spacing. Or, you can change the vertical space between paragraphs in your document by setting the spacing before or spacing after paragraphs. You can also choose to keep lines of text together or keep paragraphs together on a page. Change the line spacing in an entire document
   1. Go to Design > Paragraph Spacing.
   2. Choose an option. To single space your document, select No Paragraph Space.
   To return to the original settings later, go to Design > Paragraph Spacing and choose the option under Style Set. This may be Default or the name of style you're currently using. Change the line spacing in a portion of the document
   1. Select one or more paragraphs to update. Press Ctrl + A to select all.
   2. Go to Home > Line and Paragraph Spacing .
   3. Select Line Spacing Options and choose an option in the Line spacing box.
   4. Adjust the Before and After settings to change spacing between paragraphs.
   5. Select OK.

If the above response helps answer your question, remember to "Accept Answer" so that others in the community facing similar issues can easily find the solution. Your contribution is highly appreciated.

hth

Marcin