# Filler Render Hooks

Customize the space-filling element used to maintain layout alignment — in the all-day section to offset the scrollbar width of the timed section, and in Resource Timeline view when resource rows don't fill the full height.

`fillerClass` - a [ClassName Input](classname-input.md) for the filler element


## Argument

When the above hook is specified as a function in the form `function(info)`, the `info` is an object with the following properties:

- `inTableHeader` - `true` when the filler is rendered inside a table header