---
title: Overview
description: "Filters to customize **WordPress list tables** on back-end and front-end: - [wpda_column_default](/docs/wpda_column_default/) (change column layout/output) Filters to customize **simple forms** on back-end and front-end: - [wpda_before_simple_form](/docs/wpda_before_simple_form/) (add custom code before a data entry form) - [wpda_after_simple_form](/docs/wpda_after_simple_form/) (add custom code after…"
url: "https://docs.legacy.wpdataaccess.com/docs/filters-legacy-overview/"
updated: "2025-11-26"
category: "Legacy Tools / Code / Hooks & Filters / Filters"
---

# Overview

Filters to customize **WordPress list tables** on back-end and front-end:

- [wpda_column_default](/docs/wpda_column_default/) (change column layout/output)

Filters to customize **simple forms** on back-end and front-end:

- [wpda_before_simple_form](/docs/wpda_before_simple_form/) (add custom code before a data entry form)
- [wpda_after_simple_form](/docs/wpda_after_simple_form/) (add custom code after a data entry form)

General filters:

- [wpda_construct_where_clause](/docs/wpda_construct_where_clause/) (customize search behaviour - works with **all features**)