What is the preliminary 15 dressage test?

Answer 1

A -Enter down the center line in working trot
C -Track Left
HE -Proceed in working trot
E -Circle left 20 metresdiameter
EK -Proceed in working trot
between K&A - Transition to walk (one horses length) & proceed in working trot
FXH -Change the rein on a diagonal in working trot
between H&C - Transition to walk (one horses length) & proceed working trot
B -Circle right 20 metres diameter

After X- (on circle, after X)Give and retakethe reins
between F&A -Working Canter right
KEH- Proceed in working canter
C -Circle right 20 metres diameter
MBF -Proceed in working canter
between F&A- Forward to working trot
between A&K -Medium walk
KXM - Change rein in a free walk on long rein
M -Gather reins into medium walk
between M&C -Working trot
HEK -Proceed in working trot
between K&A -Working Canter left
A - Circle left 20 metres diameter
AFMB -Working Canter
between M&C - Working trot
HXF -Change the rein on a diagonal in working trot
A - Turn down center line
between X&G -Halt, immobility,salute.

Hope this helps, similar to the other answer, just slightly more detailed :)