The default web part pages will lose the Quick Launch navigation, so I usually create a blank ASPX page instead. These are the steps to take to create your own web part page. This is also a useful method for creating custom form pages for your lists.
- Create a document library to put your web part pages in.
- Open your site in SharePoint Designer, and click File –> New –> ASPX
- Right Click the page and open in Advanced Mode.
- Select Style Menu and choose Attach button on the Ribbon and select Default Master Page., and click Attach Master Page
- Click OK for the Default Master Page.
- Click the PlaceHolderMain section in the middle of the page, click the little chevron (the little gray button with an arrow on it), and click Create Custom Content.
- Put your cursor inside of the PlaceHolderMain section. On the Insert Menu, choose SharePoint Controls, and click Web Part Zone.
- Click File and Save As, and save it to the document library that you created at step one.
Note: If you’d like to have multiple web part zones, step 6 would be to create a table first, and then insert the web part zones into each cell of the table.