In most web browsers, you can zoom in and out by holding down the Ctrl key (the Cmd key in OS X) and pressing either the "+" or "-" key at the same time.
Another option is to use the mouse: hold down the Ctrl key and move the mouse scroll wheel. To return to normal size, press the Ctrl and 0 keys at the same time.
Search ISBN/ISSN enables to search by international standard number, publisher number, product number and printing plate number. International standard numbers (ISBN, ISSN, ISMN) are unique and enable to find exactly the publication you need from the catalogue.
ISBN - International Standard Book Number
ISSN - International Standard Serial Number
ISMN - International Standard Music Number