There are several scenarios where you will specifically need to hunt down an MT6761 scatter file:

In SP Flash Tool , click "Choose" next to the Scatter-loading File field and select the MT6761_Android_scatter.txt file from your firmware folder.

Flashing the wrong preloader or lk will hard brick your device (requiring a deep-flash cable or JTAG).

to manage the storage architecture of Android-powered devices. This paper outlines the structure, purpose, and critical role of the MT6761_Android_scatter.txt

Use a hex calculator (Windows Calculator in Programmer mode works). Let’s say you want to shrink system from 0x200000000 to 0x180000000 :