When a signature is displayed in a signature box it will be expanded to nearly fill the rectangle without distortion. This makes it less important that every signature be captured at about the same size. However, better quality signatures will be obtained if the writer does not write too small.
Make sure the signer is comfortable and in a normal writing position (sitting down, for example) to ensure the signature is truly representative.
Do not let the signer rest or press the pen on the sensitive area other than when actually signing. The contact with the pad will be stored as small dots or lines and will be captured as part of the signature. If they are some distance from where the actual signature is located this will reduce the size if the actual signature displayed.
Usually signatures are more accurate if the writer can see what has been written. For those pad types which do not use a special pen, this can be achieved by using a “Post-It” note on the pressure sensitive area and allowing the use of a regular ball-point pen.