# Column header

### Overview

When you are working on a dataset to create a dashboard, you might want to apply an operation on a specific column on the dataset you are working on. **You can access the following steps to your dataset through the hamburger menu on the data table when working with a specific column**:

* [Rename column](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/column-header/rename-column)
* [Duplicate column](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/column-header/duplicate-column)
* [Delete columns](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/filter/delete-columns)
* Other operations
  * [Filter rows](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/filter/filter-rows)
  * [Top N rows](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/filter/top-n-rows)
  * [Fill null values](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/column-header/fill-null-values)
  * [Replace values](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/column-header/replace-values)
  * [Sort values](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/column-header/sort-values)
  * [Trim spaces](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/text/trim-spaces)
  * [Get unique groups/values](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/aggregate/get-unique-groups-values)
  * [Compute statistics](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/compute/compute-statistics)

Through the column type you can access to:

* [Convert](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/column-header/convert-columns-data-types)