These commands are displayed only if a text layer is present.
In the Text to Selection drop-down list, the commands are identical to those of the Transparency sub-menu (in fact, the text is formed of areas of different transparency):
Text to Selection: 第 7.39 节 “Alpha to Selection”
Add to Selection: 第 7.40 节 “Add Alpha channel to Selection”
Subtract from Selection: 第 7.41 节 “Subtract from Selection”
Intersect with Selection: 第 7.42 节 “Intersect Alpha channel with Selection”