Final answer:
The default input and output labels can usually be changed in the settings menu, preferences tab, or customization section of the software, depending on the application in use.
Step-by-step explanation:
The default input and output labels can typically be changed in the software's settings or preferences. While the exact location of these options can vary depending on the specific software you're using, common places to look for these customization options include the settings menu, the preferences tab, or the customization section. For specialized software, such as those used for visualizing molecular structures, you might also find relevant options under a menu labeled 'Presets' or advanced options. The 'Presets' menu is often used in software to provide choices for common representations, such as different ways to visualise a protein in a molecular modeling program.