If using the full sheets, what they usually do is heat the sheet over a flame or electric coil for a little bit before serving. Makes the seaweed more flexible and less prone to cracking. They also sell them in smaller sheets and these are usually the seasoned ones. My favorite kind are the roasted and seasoned seaweed flakes with anchovies and peanuts. I use them in a similar way as furikake.

Examples of the Korean kind if anyone is curious:

• Full-sheet, including ones used for rolls: https://www.maangchi.com/ingredient/kim
• Smaller sheets: https://www.hmart.com/88070048028
• Roasted flakes: https://www.hmart.com/880105274172