You likely use a variety of monitors and resolutions. For example, the size of your computer monitor at work may be very different than your monitor at home. If you find that you want to increase or decrease the size of your view depending on your monitor size, you can adjust your browser’s zoom.
If you are using Google Chrome as your browser, you can click the wrench icon in the top right corner of your browser window and look for the zoom option. If you are using Internet Explorer as your browser, click the gear icon in the top right corner of the Page drop-down (depending on your IE version) and choose zoom in, zoom out, or set by selecting one the percentages displayed.