Go to Edit > Preferences > Search and check the box to "Enable search highlights from external highlight server". This option is by default turned off. It should be turned on to view the highlighted text of the search results.
Right click in a blank space on the Acrobat Reader toolbar, go to More Tools and a box will appear that lists the options:
Select the tools you wish to add to the toolbar. We recommend the Hand Tool, the Marquee Zoom, Zoom In and Zoom Out, Actual Size and Fit Width. You will only need to do this once, and Acrobat Reader will remember your settings across sessions and with different browsers. Click OK to save your changes.