Here are a few tips and tricks for using Acrobat Reader. Doing so will reveal the feature of each icon.
Continuous layout arranges the pages in a continuous vertical column.
Coninuous Facing layout arranges the pages side by side. Or, choose Single Page, Continuous, or Continuous Facing from the View menu. Enter the text to find in the text box. Select search options if necessary. Acrobat Reader finds the next occurance of the word.