Tables and lists When you paste text that is formatted outside Word Online as rows and columns or as sub-items in a list, the table or hierarchical structure does not appear in the pasted text. If there's a picture in another document or program that you want to use in Word Online, save the picture on your computer, then go to Insert > Picture in Word Online. Pictures you copy from the web can be pasted in the document, but Word Online doesn't support pasting pictures that are copied from other documents or programs.
In other words, characteristics of the text, such as bold, italics, or a particular size or color, are not preserved and you must reapply them in Word Online. When you paste text from outside Word Online, the text is inserted into the document as plain text. If you don't want to do this, use the -C, -X, and -V keyboard commands.
Note: If you are using Firefox and you want to use the Copy, Cut, and Paste commands on the Word Online ribbon, you need to allow JavaScript to use the clipboard.