Add path to selection

Control + Shift-click pathname

Command + Shift-click pathname

Subtract a path from selection

Control + Alt-click pathname

Command + Option-click pathname

Retain intersection of path as a selection

Control + Shift + Alt-click pathname

Command + Shift + Option-click pathname

Hide path

Control + Shift + H

Command + Shift + H

Set options for Fill Path with Foreground Color button, Stroke Path with Brush button, Load Path as a Selection button, Make Work Path from Selection button, and Create New Path button

Alt-click button

Option-click button