Page #6 is where you sign off your trademark application.
The USPTO accept an electronic signature in the form of any letter/number closed within forward slashes. For example,
is an acceptable signature for Johnathan L. Smith.
Signatory Position is your relationship to the trademark owner, which is often a legal entity (such as Inc. and LLC). You can put down your work title if the trademark owner is a company. Or if the owner is you as individual, simply "Owner."
Because it's technically the last page of the form, you should "validate" the form. What it does is, it confirms that you electronically signed your form.
Use validate, to finish up your trademark form.
That's it. Go back to see other topics in Trademark Application.