From Test-Scratch-Wiki
The Backdrop # is a local value which is set to the current backdrop of the Stage. All backdrops have both a name and number identifying their position in the backdrops pane in the Paint Editor.
There is a block that reports this value, so it can be set to a variable:
when gf clicked forever set [variable v] to (backdrop name)
Related Blocks
The following blocks can be used in conjunction with this value:
— The stage monitor and reporter block of the backdrop name
— Switches to a certain backdrop and changes the backdrop number
— A Stage-only block that switches to the next backdrop and changes the backdrop number by 1
— A hat block that starts a script when a certain backdrop is displayed
Example Uses
This value can be used in a number of ways:
- Reporting what backdrop is displaying on the stage
- Doing an action for a specific backdrop