# Function reference

You can click the **fx** button in the upper left corner of the pane to add a new function. Delete a function by clicking it, then pressing the Delete key, or by right-clicking it and selecting **Delete** from the context menu.

Every function available in Report Designer is defined and categorized according to the group it belongs to in the following topics:

* [Common functions](/pba-report-designer/9.3-report-designer/function-reference/common-functions.md)
* [Report functions](/pba-report-designer/9.3-report-designer/function-reference/report-functions.md)
* [Summary functions](/pba-report-designer/9.3-report-designer/function-reference/summary-functions.md)
* [Running functions](/pba-report-designer/9.3-report-designer/function-reference/running-functions.md)
* [Advanced functions](/pba-report-designer/9.3-report-designer/function-reference/advanced-functions.md)
* [Chart Data functions](/pba-report-designer/9.3-report-designer/function-reference/chart-data-functions.md)
* [Image functions](/pba-report-designer/9.3-report-designer/function-reference/image-functions.md)
* [Script functions](/pba-report-designer/9.3-report-designer/function-reference/script-functions.md)
* [Deprecated functions](/pba-report-designer/9.3-report-designer/function-reference/deprecated-functions.md)


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