To use Multi-Lock Scenes, you need to click on its' tab.
Multilock After A-Scene—This option only affects the numbering of Scene Headings that are inserted into a script with Multi-Locked Scene Headings and fall between two existing A-Scenes.
•2C1—Choose this option if you want a new Scene Heading added in this case to be numbered as Number-Letter-Number. For example, a scene inserted between scenes 12A and 12B would be 12A1, the next one would be 12A2 and so on.
•2CA—Choose this option if you want a new Scene Heading added in this case to be numbered as Number-Letter-Letter. For example, a scene inserted between scenes 12A and 12B would be 12AA, the next one would be 12AB and so on.
Multi-Lock After Normal Scene:—Determines how a Multi-Lock Scene inserted between a Normal Scene and an A-Scene is numbered:
•2-A—Adds a Dash plus the A-Letter after the scene number.
•2AA—Adds the A-Letter plus the Multi-Lock Letter after the scene number.
•A2—Flips the normal A-Scene numbering order.