# window_copy_mode_data.backing_written

- **Language:** C
- **Kind:** attribute
- **Source:** https://github.com/tmux/tmux/blob/e476c1230b958df0cb12977517d24b3dc931375b/window-copy.c#L255
- **Page:** https://libtmux.org/en/tmux/latest/reference/c-struct-window_copy_mode_data-backing_written/

```c
int backing_written;
```