webpart dropdown is missing

We all knows that Web Parts are server-side controls that run inside the context of site pages in SharePoint. Whatever the list and libraries that we create and worked on-we can add all of them as webparts on any page as per our project requirements.Ultimately we can playaround with the webparts and display the view to the users as per our requirements, we can replicate the original list/libraries as it is on any page as a webpart. so basically webparts functionality is of vital importane in SharePoint and great to deal with !!

When you go to a document library or list in SharePoint, you see a dropdown in which you can select a different view or create a new view .But sometimes we face the situation that we cannot see a webpart dropdown to change the view settings/create a new view.

This problem is very common in terms of webparts and we generally neglect the problem and resolved it by creating a new view. Now you will ask me a questions that if i dont see a webpart dropdown then how i will create a new view ? You are abolutely correct !!!
But the answer is very simple that we can tweaked the URL and jump of to the 'create view' page.

Coming back to the main problem now:
What are the reasons that the webpart view has been disappeared ?
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• You added a second document library webpart on your page, but this would be quite obvious because you would see two webparts, one with a dropdown and one without it.
• You closed the webpart and added it again, leaving the closed webpart on the page, but hidden. This one is difficult to detect, because you can only see the webpart without the dropdown.

Resolution:
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-Simply delete the second webpart from the page or you leave it on there (but without the dropdown).

OR

-Adding the closed webpart by editing the page.

How to add a closed webpart by editing the page:-
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1. Go to Site Actions and choose Edit Page from the dropdown.

2. Choose Add a Web Part.

3. Add the bottom right of the menu, choose Advanced Web Part gallery and options.

4. A menu will appear on the right side, choose Closed Web Parts.

5. From the menu, under Web Part List, choose the list that you have closed.

6.Two webpart will appear, one with the view and the one without. Just close the webpart of the one without view dropdown in the edit mode.

If you have any queries/questions regarding the mentioned information then please let me know..
I would be more than HAPPY to HELP U as well as RESOLVES UR ISSUES...