Singer has many of their manuals available as a PDF on their support site:
https://www.singer.com/support . Entering the model 14, I found the link to the 14U344/14U344B/14U354/14U354B Serger/Overlocker manual. It was the seventh link (on page 1) of 33 search results. The direct link is currently
https://www.singer.com/sites/default/files/product_manual/SINGER%2014U344_14U344B_14U354%20and%2014U354B%20Serger_Overlock.pdf .
I hope this helps. The images and directions for setting the tension for different stitches starts on page 20 (page 22 of the PDF). If you can, I'd suggest printing at least the tension information pages. If you'd like to get a printed copy, some online sewing machine part stores have the manual. One source is https://www.sewingpartsonline.com/singer-14u344b-serger-parts.aspx?sort.ss_cat_sort=desc&index=67 . The link to purchase the manual is https://www.sewingpartsonline.com/singer-14u344b-instruction-manual.aspx . Alternatively, you could get the manual printed at any print shop (like Kinkos).
Cindy Wells
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