How does express-handlebars configure multiple entry files in layouts?

because there is a requirement now, the foreground page entry configured in layouts is main.handlebars.
what should I do if I want the background entry to be configured here? No similar documents or instructions were found online.

Please give me some advice, thank you!

Apr.25,2022
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1be26f6-315e3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1be26f6-315e3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?