Final answer:
To have a style library appear in the Photoshop styles palette menu, save the style files in the Presets/Styles folder inside the Photoshop program folder.
Step-by-step explanation:
In Adobe Photoshop, to ensure that a style library is available from the styles palette menu, you should save the style files to the Presets/Styles folder located within the Photoshop program folder. This folder is specifically set up by Photoshop to store and manage styles, brushes, and other preset elements that users can easily access within the software environment.
It's important to note that placing the style files in the correct directory is necessary for Photoshop to recognize and list them in the styles palette automatically. If the files are stored in a different location, you may have to manually load them into Photoshop each time you want to use them, which can be inconvenient.