`controls` | `0` or `1` | Turn arrow controls on/off
`progress` | `0` or `1` | Turn progress bar on/off
`slideNumber` | `true` or `false` | Turn slide numbers on/off
## Columns
## Columns
A column slide can be defined by `{layout="columns"}` in the slide header and by defining the orientation and scope each column in subheaders with `{.left}`. `{.center}` (optional), or `{.right}` tags.
A column slide can be defined by `{layout="columns"}` in the slide header and by defining the orientation and scope each column in subheaders with `{.left}`. `{.center}` (optional), or `{.right}` tags.
