# window_copy_mode_data.backing_written

- **Language:** C
- **Kind:** attribute
- **Source:** https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-copy.c#L224
- **Page:** https://libtmux.org/en/tmux/3.2a/reference/c-struct-window_copy_mode_data-backing_written/

```c
int backing_written;
```