In Windows 8.1, Internet Explorer opens in either the modern user interface or on the desktop. In the modern UI, it takes up the full screen but includes settings in the menu bar for switching to desktop mode. When you launch IE on the desktop, you can adjust the window size by clicking and dragging the window frame.
Open IE on the Desktop
If you open IE by clicking the Start screen tile, it usually opens in full screen mode, but if you launch it from the desktop taskbar, it opens in desktop mode. To set IE to open only in desktop mode, open "Internet Options" from the Tools menu. If IE is currently open in full screen mode, click "Page Tools" and select "View in the Desktop." In desktop mode, click the "Gear" icon, select "Internet Options" and then click the "Programs" tab. Under Choose How You Open Links, select "Always in Internet Explorer on the Desktop" and check the box next to "Open Internet Explorer Tiles on the Desktop." Click "Apply" and "OK" to save your changes.
Adjust Window Settings
By default, the IE window takes up less screen space than most programs, but you can shrink it even more by dragging the window handles. Hover the cursor over a window corner until it displays a double arrow icon tilted at a 45-degree angle, then left-click and drag the corner toward the opposite corner until the window is the right size. As you shrink the window, page elements disappear because they don't have enough room in the window. You can restore them by holding "Ctrl" and pressing "Minus" to zoom the page out. If the text is too small the read, press "Alt" to show the menu bar, then click "View," point the cursor to "Text Size" and choose a larger size.