Peek Through

Peek Through is a small OS enhancement tool whose purpose is to help you make windows transparent with the aid of a custom hotkey.

Look for the utility in the system tray

The application is unobtrusive so it does not stand in your way and affect your work. It can be found in the system tray area. A simple left-click on its icon brings the configuration panel to your view.
You cannot find a help manual in the package but the dedicated parameters look easy to decode so you are not going to invest a lot of time into the setup process.

Set the preferred transparency

Peek Through gives you the freedom to customize the transparency of any window. You only need to assign a hotkey that is used for enabling or disabling the transparency. Plus, you should make sure the hotkey does not conflict with others used by system tools or third-party utilities.
What’s more, you are allowed to adjust the transparency level (you cannot preview the results), run the program at Windows startup, as well as allow mouse clicks to be performed through transparent windows.
Tests have shown that Peek Through alters the transparency of any window very quickly and without errors. It is not a resource hog so you can keep it running in the background without worrying that it eats up CPU and memory resources.

Bottom line

All things considered, Peek Through comes packed with basic and efficient features for making all applications transparent and allowing clicks to be activated through them. It is suitable for rookies and professionals alike.