I find one of the handiest features within Windows 7 to be the taskbar preview (the preview window you see when hovering your mouse over the task bar icon). Yet, Windows 7 does not provide the ability to increase the size or any other options of this preview window. The default preview size can create a bit of confusion to identify the right window when one has many side by side stacked windows of the same application (i.e.: a browser).
Windows 7 Taskbar Big Preview is a portable tool (no install needed!) that increases the display size of the live preview in Windows 7 taskbar. Although the default preview size is quite handy and viewable, yet many a times, a bigger preview can be helpful for people with eye sight problems and those who may require checking multiple side by side stacked Windows to quickly identify the right one.
In order to make the size change, simply launch Windows 7 Taskbar Big Preview and click on the ‘Enable Big Live Preview’ button.
You will then be prompted to restart your system for the changes to take effect. Click ‘OK’ and reboot your system.
Once the system has been restarted, you will be able to get the larger taskbar preview window. The increased size is significantly larger than the default preview size in Windows 7. This enables a better overview of the content of the Window and makes it easier to identify the window that you wish to switch to. To disable the large preview, launch Windows 7 Taskbar Big Preview and click on Disable Big Live preview and you will be prompted to restart once more.