# Column Resizing & Wrapping

`dtsmartr` supports flexible column presentation settings for clear and dynamic data display.

## 1. Column Resizing

Columns can be resized dynamically inside the browser: - Hover over the right edge of any column header to reveal a blue drag handle. - Drag left or right to change column widths to fit your data.

## 2. Auto Text-Wrapping

When columns contain long strings (e.g. sentences, address logs, or uppercase category labels), the grid wraps text automatically onto multiple lines: - The virtualized grid adjusts row heights dynamically. - Alignment remains perfect, and viewport performance stays smooth.

## 3. Custom Default Hidden Columns

You can set columns to be hidden by default on load using the `hidden_columns` parameter in `dtsmartr_options()` (try using the Column Picker in the live widget below to show them!):

    library(dtsmartr)

    dtsmartr(
      mtcars,
      options = dtsmartr_options(
        hidden_columns = c("mpg", "cyl")
      )
    )

## 4. Toggle Header Summaries

By default, column headers show a Kaggle-style summary micro-dashboard (histograms for numbers, stacked completeness bar charts for categories, evolutionary data ranges). You can turn this off to render a compact layout:

    # Collapses headers to standard compact labels
    dtsmartr(
      mtcars,
      options = dtsmartr_options(
        header_summary = FALSE
      )
    )