Nothing looks worse than knobs or handles which do not line-up correctly on cabinets or furniture. Correctly installing drawer pulls, fixed handles or knobs requires lining up holes consistently at same location on doors or drawers. The simplest way to create a cohesive install is to make a template to mark placement location of screw holes.
If installing bail pulls, handles or knobs: on just drawers or doors, one template will be necessary.
If installing handles or knobs: on both drawers and doors two templates will be necessary. One for drawers and one for doors.
Create a cardboard or wood template:
Cut two squares of cardboard or wood
Tape two squares together to form an upside down "T"
Determine location of knob on drawer or door.
Edges of template square should line up with edges of cabinet doors or drawers.
Line vertical square up with bottom and side of cabinet door; push horizontal square (flat base) of template up against underside of cabinet door.
Mark screw-hole location on template, with template held in place
Drill small hole through template at screw-hole location
Mark each screw-hole location, with an awl or pencil, using template
Note: if also using on drawers a second template will need to be created in the same manner as described above, marking the knob location on the drawer front
Follow the above directions, with the exception of marking two screw-holes, they must be set the correct boring distance apart
Boring: distance from the center of one mounting hole to the center of the second mounting hole
Overall Size: widest measurement x tallest measurement
Once the template is created it should be easy to locate and mark location of holes on multiple drawers or doors without having to re-measure.
If handles and knobs are-not lined up in a straight, cohesive pattern, appearance of furniture and cabinets will look be amateurish.
Drilling drawer pull and knob mounting holes:
Drill marked location using correct size drill bit (see chart below)
For Softwoods: use a drill-bit approximately 1/64” smaller than target hole size
For Hardwoods: use a drill-bit the same-size as the target hole size