# format_upper

- **Language:** C
- **Kind:** attribute
- **Source:** https://github.com/tmux/tmux/blob/e476c1230b958df0cb12977517d24b3dc931375b/format.c#L203
- **Page:** https://libtmux.org/en/tmux/latest/reference/c-variable-format-c-format_upper/

```c
static const char * format_upper[] = {
    NULL,       
    NULL,       
    NULL,       
    "pane_id",  
    NULL,       
    "window_flags", 
    NULL,       
    "host",     
    "window_index", 
    NULL,       
    NULL,       
    NULL,       
    NULL,       
    NULL,       
    NULL,       
    "pane_index",   
    NULL,       
    NULL,       
    "session_name", 
    "pane_title",   
    NULL,       
    NULL,       
    "window_name",  
    NULL,       
    NULL,       
    NULL        
};
```

## Referenced by

- [`format_expand1`](/en/tmux/latest/reference/c-function-format-c-format_expand1/) (function)