Claudiu on SharePoint

Scenario:
Open the page in edit mode by adding some query string parameters to the url

Simply append the following to the URL:

?ToolPaneView=2&pagemode=edit

Your url:

http://site:port/web/page.aspx

... will become:

http://site:port/web/page.aspx?ToolPaneView=2&pagemode=edit

The page will open in edit mode with the "Add Web Parts" web part visible.