Inline editing is a handy bit of user friendliness,less time consuming and an efficient way of editing a value of a field from the detail page of a record OR from List View of records . Enabling inline editing is simple. We can enable from User Interface settings. Here an image where you can enable inline editing. Go to the Set up-->Customize-->User Interface-- check Enable Inline Editing check box. Now inline editing concept will not work for some object. Why is it not working for some object ? To use inline editing concept then edit action of specific object should not overridden with any visual-force page. If the Edit action has been overridden for an object, Inline Editing will not be available for that object. To determine this: For standard objects : Go to Setup | Customize | <Object> | Buttons & Links, and note the "Overridden" checkbox next to the 'Edit' standard button. For custom objects: Go to Setup | Create | Objec...
A place where you have to land for exploring Salesforce