Below, I do the same with his rear hooves.
I pick up his hoof, then
rest it on my leg,
as shown in the righthand picture.
Shown below is our farrier, Tracey, trimming
the hooves of our 16 month
old filly,
Rosa,
and our "20 something" Appaloosa mare, Aspen.

First, Tracey clipped a little of
each hoove off with a
special tool and then she used a BIG file (similar
to
what we use on our fingernails) to even off the
hoof all around the bottom of it.
(Don't worry,
just like we clip our toenails, the horse can't feel the trim.)
Here's Magnum, our Quarter horse gelding, getting his
trim from
Tracey. Our horses go barefoot most of the
year unless we ride alot on pavement or rocky
areas
where they'll need more traction & support. Like most
horses, our's our
trimmed or shod every 6 to 8 weeks.