{optional-arguments} concerns commands and environments that accept optional arguments. For example the \sqrt command can be used as \sqrt[3]{x}.

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Class Variables

I am exploring the use of class options, I was under the impression that optional arguments presented at the point of class declaration, were subsequently presented to all packages used thereafter. ...
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Adding an argument/variable in `sequencediagram` (pgf-umlsd)

My aim is to have the possiblity to configure in the figure tex either if the vertical bar of a sequence diagram is dotted, plain, thick, etc. Depending on the diagram, I wish I could have the choice ...
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Prepend and append options to options list in environment

I need to define a macro superenv that expands to the usage of an environment which accepts key-value options. superenv should have three arguments: the environment name, the list of options, and the ...