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

Through the column type you can access to:

* [Convert](/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/column-header/convert-columns-data-types.md)


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