There are several possibilities. To list the two most common:
c:\full\path\to\gswin32c.exe should always work. For 64-bit systems, use c:\full\path\to\gswin64c.exe .- After a new installation using the standard Windows installer, you may need to reboot before the updated environment variable
%path% . - Open the
cmd window and (assuming your Ghostscript installation is in c:\path\to\gs ...), enter set path=c:\path\to\gs\gs9.02\bin;%path% . From the same CMD window, you can simply use gswin32c to run Ghostscript (use gswin64c on 64-bit Windows) ...
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