Device Control
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The `x' command is normally followed by a letter or word indicating
the function to perform, followed by white space separated arguments.
The first argument can be abbreviated to the first letter.
`x init'
`x T'
`x res N H V'
`x H'
The argument to the `x Height' command is also in scaled points.
The first three output commands are guaranteed to be:
x T device
x res n h v
x init
For example, the input
crunchy \fH\s+2frog\s0\fP!?
produces