Digitally sign with certificates & resize / default size of field.

We sign in the top right corner of the document. Due to the large default size of the signature, and the location of the cursor, I can't draw the box without zooming way out so that my cursor can go off the page. Is there a way to change the default size of the box? Or even better allow me to draw the box the same way it works with prepare form, where the cursor is at the top left of the box instead of the bottom right.

This happens only when using Certificates > Digitally Sign. All other forms / boxes work how I would expect.