Last Updated on June 1, 2026
As you may have noticed, people are creatures of habit and like to have things be the same way each time they use them. This is no different for our tech devices such as computers and smartphones.
If you are running Microsoft Windows on your computer, you may have noticed that when you open programs, they tend to have a mind of their own and open if a variety of sizes. Many people like to have their programs open full screen, but others like to use their own custom size. In this article, we will be showing you how to resize any open window to a custom size or location on your monitor.
To accomplish this, we will be using a free app called Sizer that you can download from their website here. Once you install the software and run it, you will find it running in the Windows system tray.
1. Open the Sizer Configuration Menu
You can double click the Sizer icon located in the taskbar to open the program. This action launches the main dashboard to configure its precise system settings. As you can see in the image below, there are many preconfigured sizes to choose from right out of the box.
2. Manage the Default Size Entries
These default configurations are broken down into specific aspect ratio groups such as 4:3, 16:9 and even some YouTube settings. You can easily move the default entries up and down in the list to order them exactly as you please. If there are too many options cluttering your view, you can delete any that you do not want to use with the Sizer app.
3. Trigger the Sizer Shortcut Keys
To use Sizer to resize your open windows, simply select the active window you want to change. Press the default Sizer shortcut keys on your keyboard, which are Ctrl-Win-Z. You can completely change the shortcut keys later if you want to use a different key combination for your personal workflow.
4. Choose Your Target Dimensions
Once you press the key combination, you will see the specialized Sizer menu appear directly on your open window. Then all you need to do is click the exact size you want from the context menu. Your active application window will then be snapped and resized to that exact pixel dimension immediately.
5. Create a Custom Window Size
If you want to create your own custom size, you can do that as well by clicking the Add Size button. You can give your new size a highly descriptive name to find it easily later. Choose its exact pixel dimensions for the overall width and height parameters. You can even assign this specific profile a custom shortcut key combination for instant desktop access.
6. Reposition the Window Location
Sizer does much more than just scale the application frame. If you want to also have the window moved to a different location on your screen automatically, you can do so from the Move to dropdown menu. This forces the application to snap to a specific monitor corner or perfectly center itself on your display.
7. Adjust Core Application Settings
If you click on the Options tab at the top of the interface, you will find a few extra system settings. You can adjust background behaviors such as changing the default shortcut key combination used to trigger the overlay menu. You can also toggle the window tooltip display setting to show the width and height while dragging window edges manually.
8. Organize Your Menu Layout
If you want to organize your settings, you can click on the Add Other button to add a new categorical group or visual separator. Then you can use the Move Up and Move Down buttons to rearrange the size selections into a logical order. Once you add your custom sizes and remove any default sizes that you do not need, your Sizer configuration will be much more streamlined. It will make it significantly quicker to resize your active windows exactly as needed.
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