Sequences that insert characters/lines, delete characters/lines, or
modify larger regions are changed to act upon multiple layers as
-defined below. By default, MSL (Modify All Layers) is off/unset, and
-Z is 1, so if the application never changes MSL or Z then these
-sequences will produce the same visible output as a terminal without
-layer support.
+defined below. By default, MSL (Manipulate Single Layer) is
+off/unset, and Z is 1, so if the application never changes MSL or Z
+then these sequences will produce the same visible output as a
+terminal without layer support.
A terminal is not required to support all of these sequences; however,
for those sequences it does support, if it supports the layers feature