The Obelisk

The easiest way for me is to use a pane of glass bigger than the paper, cut out a card a little smaller than the size of the image, place it precisely on the paper then the glass to hold it flat. Hardest part is to square everything up, I mark lines. Flash. Then put the paper in the easel and expose image as normal.
Thats one method, sure someone will have something easier.

One simple way I've seen to get a black border: cut a card one border smaller than your easel opening in each dimension (so for a quarter inch border in an 8x10 easel, you'd cut 7 3/4 x 9 3/4). After primary exposure, remove the negative (carrier), put the card in one corner of the opening, expose for your full print exposure (to get full black), then move the card to the opposite corner and expose full print exposure again.

Thanks for the advice! Will be months before I can print again.. but I cannot wait!