You can place the automatically generated number anywhere else in the name by using a token. When you type the pool name, type n surrounded by curly brackets to designate the token.
For example: amber-{n}-desktop
When a machine is created, Horizon 7 replaces {n} with a unique number.
You can generate a fixed-length token by typing {n:fixed=number of digits}.
Horizon 7 replaces the token with numbers containing the specified number of digits.
For example, if you type amber-{n:fixed=3}, Horizon 7 replaces {n:fixed=3} with a three-digit number and creates these machine names: amber-001, amber-002, amber-003, and so on.