Select Home > Search > Search > Search Current to view the Search panel.

Click the gear icon next to the text box to access search settings as follows:

Match Case

Finds only the words that exactly match the case you enter. For example, if you search for the word "Internet", the words "INTERNET" and "internet" are not found.

Match whole word only

Finds only the complete word that matches the word you type in the Find box. For example, if you search for the word "trace", "race" and "tracer" are not found.

Include Bookmarks

Searches bookmarks along with the text content of your PDF.

Include Comments

Searches comments along with the text content of your PDF.

Fuzzy Search

Runs a flexible search like internet search engines. See Fuzzy search for details.

For more search options, and to search through multiple PDF files, search by patterns or masks, or search through pre-built index files, select Search Multiple to view the full Search dialog box.