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.
Some libraries enable self-registration via the web.
To use this option, choose the desired library and click Register as reader / Register as user.
Self-registration is offered by the following libraries:
NB! You can register to become reader also on site in the libraries.
More information on registration is available on the website of each library.