Edit Web Part Properties in SharePoint 2010
Editing Web Part properties in SharePoint 2010 is pretty straightforward. Again, experimenting is key. The most commonly used sections are located at the top of the tool pane: Selected View, Toolbar, and Appearance. Many users don’t realize how much they can enhance the user experience with the Web Part by the using the options available.
To open the Web Part tool pane and modify Web Part properties, follow these steps:
Click the Web Part menu on the Web Part and choose Edit Web Part.
The tool pane opens. You may need to select the plus sign to open certain sections.
You don't need to be in page Edit mode to modify a Web Part. If the title bar is visible and you have the proper permissions, you see the Edit drop-down list even when the page isn't in Edit mode.
Adjust properties as desired.
Click the Apply button to apply your current changes before modifying others, or click OK to finish modifying.
Your changes are visible in the Web Part.
You have two options for removing a Web Part from your page — minimizing or deleting. Closing a Web Part leaves the Web Part on the page so you can enable it again for future use. Deleting the Web Part removes the Web Part from your page (but doesn’t delete it from SharePoint).
To close or delete a Web Part from your page, click the Web Part menu and choose Close or Delete.
Every now and then a Web Part misbehaves and prevents your page from opening. If you edit the properties of your page, you find a link to the Web Part Maintenance page. Use this link to close or delete Web Parts that are preventing your page from opening.