Choose and/or plan out your design on your graph paper, lay your garment out flat and attach your graph paper, going through one layer, to the right side of your garment.

Make sure the design you're planning is symmetrical.

Use a marker pen to dot out where to put your studs, on the corner of each of the squares your line pattern covers, pin onto your fabric, then put in and secure your studs.

…And, finally, pick your paper off with your unpicker or scalpel, taking extra special care not to damage your garment.

...And you should have something that looks like this...