... keep it in a variable ...
Not being quite as adventurous as choroba or kcott, I will often use a constant for something like this. The other alternative is a Readonly hash, but Readonly imposes execution overhead that may be undesirable. The functional approach of stefbv is also nice.
use constant SCALE_DEFAULTS => qw(-width 10 -length 200 -etc 42);
my $s = $MW->Scale(SCALE_DEFAULTS, -override => 1, etc...);
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