Making Pleats by hand looks beautiful- How to make the pleats?

PLEATS BY HAND
Plan a suitable size and spacing of pleats and work out how much fullness this requires. For example, for triple pleats taking 25cm(10 in) of fabric, spaced 15cm(6 in) apart, the fullness is just under 3 times the width of the pleated curtain (because you need 40 cm/16 in to cover 15 cm/6 in of track). To find out how many widths of fabric you will need for each curtain, multiply the distance the curtain is to cover by the fullness allowance, and divide by the width of fabric, rounding the figure up or down to the nearest half. Multiply by two (or the number of curtains) to give the total number of widths of fabric required.
Decide on the finished length and add an allowance of 10cmand at the hem and allows matching if necessary, multi-length by the total number of the amount of fabric. Work out the total width(un-pleated) curtain by multiplier of widths required by the fabric, subtracting 4cm(down each side edge of the curt total number of pleats, take (pleated) width of the curtain a space allowance at each side (2 in). Then divide by the plea tween the pleats. Round up c nearest whole number and add CURTAINS PLEATS BY HAND Plan a suitable size and spacing of pleats and work out how much fullness this requires.
For example, for triple pleats taking 25 cm (10 in) of fabric, spaced 15cm(6 in) apart, the fullness is just under 3 times the width of the pleated curtain (because you need 40 cm/16 in to cover 15 cm/6 in of track). To find out how many widths of fabric you will need for each curtain, multiply the distance the curtain is to cover by the fullness allowance, and divide by the width of fabric, rounding the figure up or down to the nearest half. Multiply by two (or the number of curtains) to give the total number of widths of fabric required. 
Decide on the finished length of the curtains and add an allowance of 10 elms (4 in) at the top and at the hem and an allowance for pattern matching if necessary. Multiply the finished length by the total number of widths to give the amount of fabric.
Work out the total width of the made-up (un-pleated) curtain by multiplying the number of widths required by the width of the fabric, subtracting 4 CMS for turnings down each side edge of the curtain. To find the total number of pleats, take the finished (pleated) width of the curtain and subtract the space allowance at each side edge, say 5 cm (2 in). Then divide by the planned space between the pleats. Round up or down to the nearest whole number and add one. (Calculate 1 the adjusted distance between the pleats if you have rounded the figure.)
Finally, check that the planned size of the pleats takes up all the fullness of the fabric. Make minor adjustments to the seam allowance and space at each side of the curtain to make measuring and marking up easier. For lining, you will need enough fabric to make up a panel the width of the finished curtain, as calculated above. No extra side turning allowance is required. For the length, add 12mm U in) top turning and 6 CMS hem allowance. Interlining should be the same size as the finished curtain. Make up a curtain panel, matching pattern, and a lining panel, using Rat seams and clipping into the selvages. Makeup interlining, using lapped seams (  199). Cut a strip of interfacing (woven or iron-on) 10 cm (4 in) deep (or more, according to the depth of heading) to match the width of the finished curtain.

Mark the turning allowance at the top of the curtain. Apply interfacing across the top turning, aligning the top of the interfacing with the top fold line of the curtain, position interlining on the wrong side of the fabric, leaving turning allowances all around. Lock- stitch in place, then press the turnings at the top and sides of the curtain over the interlining and herringbone stitch in place. Turn up and stitch a 4 cm double hem across the lower edge of the lining. Turn under and press 2 in) seams all round. Lockstitch lining to interlining, then slip stitch the folded edges of the lining to the folded edges of the curtain across the top and down the sides. Turn up the hem of the curtain and slipstitch in place beneath lining.