# Using Query String Parameters in a Page

As shown in earlier examples, the default page context—that is, the record that provides the source of data displayed on the page—is controlled by a query string parameter named `id` in the page URL. You can also get and set query string parameters in the Visualforce markup.

- **[Getting Query String Parameters](/docs/platform/salesforce-pages-developers-guide/guide/pages-quick-start-query-params-getting.md)**

- **[Setting Query String Parameters in Links](/docs/platform/salesforce-pages-developers-guide/guide/pages-quick-start-query-params-setting.md)**

- **[Getting and Setting Query String Parameters on a Single Page](/docs/platform/salesforce-pages-developers-guide/guide/pages-quick-start-query-params-getting-setting.md)**