How to zoom when editing pictures on the official website of Tencent documents

as shown in the figure, how is the scaling of the four corners of the picture realized?

Jun.15,2022
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-64f5-1e89e4d-46d59.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e89e4d-46d59.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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