An easy way to ensure all manuscript text is double spaced in Microsoft Word:
(1) Use the Select All command (Ctrl + A) to select all text.
(2) From the Paragraph menu, click on the Line Spacing icon (has two blue arrows, one up and down, next to four black lines). A drop-down menu will appear. Select "2.0," and double spacing will be applied to the text you selected.(3) You might also want to return to the Line Spacing icon, click on it, and while all text is still selected, choose "Remove Space After Paragraph" or "Remove Space Before Paragraph" (if shown in menu) to ensure you have cleared any extra/weird spacing after/before your paragraphs.