How to cut and hem up an already made block out curtain?

First: I sewed free stitching line to stay stretch and used that line to fold in. When I sew I stretch bottom piece a bit forward to my body to avoid twisted, make sure it is even at the end before you nearly get there.
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🇸🇦 *URGENTLY REQUIRED FOR SAUDI ARABIA* 🇸🇦
📍 *CATEGORY : SAUDI RETURN CURTAINS TAILOR(PARDA )CUTTING AND STITCHING MASTER *
*SALARY : 1500+ FOOD+INTERNET, ALL ACCOMODATION PROVIDED
*SECTOR - ALQASSIM,
*RELIGION - MUSLIM
*QTY. 2*
Duty-9 hour's

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