While Comment does not support multiple line entry/display, MC has several built-in tags that do, such as Notes and Description, both of which sound ideally suited for your desired purpose. If for some reason you don't want to use those fields, or are using them for something else already, you can create your own custom field - just be sure to designate the edit type as "Large Value".
And you can easily move your existing comments to another tag by selecting the desired files, right-click for the context menu and select LibraryTools > Moving / Copy Fields…
All that said, viewing the contents will be limited to the popup as you hover over it for the multi-line tags/fields I suggested, though at least with these tags, the text will at least wrap around, versus what you are seeing when using the comments tag. If you want to display the information in the main window however, your idea of copying them into the lyrics tag could be used to accomplish that.
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Topic: Best practice to display long comments (Read 239 times)