There are various viewing options for the e-Textbook contents in iSolution.
Click on the toolbar after opening a book page, you will see the below buttons:
Zoom in/out
Click on the toolbar to zoom in or out by using the scroll wheel on your mouse after placed your mouse cursor on the page.
Fast zoom to specific area
Click on the toolbar to zoom to the specific area which is selected by mouse cursor.
Resize the page
Click on the toolbar to resize the page to fit the height of the window.
Click on the toolbar to resize the page to fit the width of the window.