# GRID_ATTR_UNDERSCORE_4

- **Language:** C
- **Kind:** constant
- **Source:** https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/tmux.h#L661
- **Page:** https://libtmux.org/en/tmux/3.2a/reference/c-define-tmux-h-grid_attr_underscore_4/

```c
#define GRID_ATTR_UNDERSCORE_4 0x800
```

## Referenced by

- [`attributes_fromstring`](/en/tmux/3.2a/reference/c-function-attributes_fromstring/) (function)
- [`attributes_tostring`](/en/tmux/3.2a/reference/c-function-attributes_tostring/) (function)
- [`GRID_ATTR_ALL_UNDERSCORE`](/en/tmux/3.2a/reference/c-define-tmux-h-grid_attr_all_underscore/) (constant)
- [`grid_string_cells_code`](/en/tmux/3.2a/reference/c-function-grid-c-grid_string_cells_code/) (function)
- [`input_csi_dispatch_sgr_colon`](/en/tmux/3.2a/reference/c-function-input-c-input_csi_dispatch_sgr_colon/) (function)
- [`tty_attributes`](/en/tmux/3.2a/reference/c-function-tty_attributes/) (function)