Reduce Microsoft Word file size

I have a word file with tens of screen captures in it, causing the file size is so huge (around 36MB).

I would like to know if there is any way to reduce the file size.
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Reduce the quality of the pictures before inserting them.
kwlolAuthor Commented:
How about the pictures are already in the file?
Should I reduce the quality of each picture? Or any option in Word to globally reduce the quality of all pictures?
I'm not aware of any built-in option.
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kwlolAuthor Commented:
I did the screen captures by pressing PrintScreen (or Alt+PrintScreen) and then paste them in the Word file.
For the next time, how should I paste the screen captures in Word if I want to keep the file size smaller?
You can use the tools this website provides.
Let's GoCommented:

You should make sure the document is saved in the newer .docx format (not the older .doc format) to take advantage of its better file compression.  

You may be surprised at the difference this makes: I just tried both formats for a Word document containing 10 screen dumps and found that the doc file was about 9 times the size of the docx file.

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