How to Use OnTopReplica
Learn how to use OnTopReplica with this step-by-step beginner’s guide. Discover how to create always-on-top overlays, mirror application windows, adjust transparency, crop specific regions, enable click-through mode, and customize settings to get the most out of OnTopReplica on Windows.
Basics
Create your first overlay
Launch OnTopReplica from your Start menu.
Open OnTopReplica from the Windows Start menu or desktop shortcut. Once launched, the application is ready to create live window overlays for seamless multitasking.
Right-click anywhere on the OnTopReplica window to open the menu.
Right-click anywhere inside the OnTopReplica window to access the settings menu, where you can configure overlays, transparency, cropping, and other customization options.
Choose 'Select region → Window' and pick any open app.
Click Select Region → Window, then choose any open application you want to mirror. OnTopReplica will instantly create a live overlay of the selected window.
The window is now mirrored as a live overlay resize or drag it anywhere.
Resize, reposition, or crop the mirrored overlay to display only the content you need. You can also adjust transparency for a cleaner and more organized workspace.
Enable 'Always on top' (on by default) to keep it pinned above everything.
Always on Top option is enabled by default, ensuring your overlay stays visible above other applications. You can also enable click-through mode for uninterrupted interaction with programs underneath.
Basics
Adjust opacity for the perfect blend
Right-click the overlay → hover ‘Opacity’ → pick a level from 10% to 100%. Lower opacity is perfect for reference material; higher opacity is best for active viewing.
Cropping
Show only what matters
Instead of mirroring an entire window, use ‘Select region → Custom region’ to crop out just a slice — a scoreboard, chat panel, chart, or timer.
Click through
Interact with what's behind
Toggle ‘Click through’ from the right-click menu. All mouse and keyboard input will pass through the overlay directly to the app underneath — ideal for keeping notes visible while typing.
Pro tips
Get the most out of OnTopReplica
- Use Click-Through Mode while watching videos, tutorials, or live streams so you can continue working in other applications without interrupting your workflow.
- Set Overlay Transparency to 40–60% for documents, coding references, or study materials to keep important content visible without distracting from your main task.
- Crop Only the Required Window Region to display a chart, minimap, scoreboard, timer, or chat panel instead of the entire application, creating a cleaner and more focused desktop.
- Pin OnTopReplica to Your Windows Taskbar for one-click access and faster launching whenever you need an always-on-top screen overlay.
- Save Your Favorite Overlay Settings by creating presets for window size, position, transparency, and cropped regions, making it easy to restore your ideal workspace for gaming, streaming, coding, or productivity.