print preview not available

Opened a text file today, and cannot use print preview button. Opened a second file and print preview is available. How can I make it available on all text files?
Using Windows 10.

Edit your question for the following info: what are the differences between the files? Filename extension? Other characteristics?

Both files opened in writer. the one where the preview was available wahad been converted to a .doc file. The one without print preview was an odt file. However, since I posted, the problem has cleared. I closed the file, and when I reopened it, the preview button was available again.
Sorry I posted my question too quickly

Please, close your question, selecting “Question irrelevant or outdated” as reason for closing (use the drop down menu after you activated close).