Zoom - click the zoom icon at the top, the center icon is to set it to default zoom size which
is "fit to height". You may also use the scroll up/arrow up for "zoom in" and scroll down/arrow down for zoom out.
Once it is in zoom in state, you may drag the page to the position you are comfortable with. Next Page - arrow right, page down are the shortcut keys to turn to the next page, or you
may click the "next icon". Previous Page - arrow left, page up are the shortcut keys to turn to the previous page, or you
may click the "previous icon". Go to Page - you can move directly to an specific page by entering the page number
in the textbox provided then ENTER/clicking the "Go" button. Search for - you can use this option to search for a specific word/term or phrase. Just
enter the phrase in the textbox provided then press ENTER/clicking the "Enter" button.