How To Resize Window Capture in OBS: Easy Step-by-Step Guide

Window capture in OBS (Open Broadcaster Software) is pretty handy when you want to show only a specific app or window. But sometimes, the default size just doesn’t fit your layout, and resizing becomes necessary. Not sure why, but grabbing that red border and dragging it around is the quick way to go. Just a heads-up—the size isn’t locked in stone, so you can tweak it on the fly.

Step 1: Open OBS Studio and Add a Window Capture Source

First, fire up OBS Studio. If you haven’t already added a Window Capture source, do it now: hit that + in the Sources panel and pick Window Capture. It’s the easiest way to record a specific program window (like Chrome, Discord, or whatever). If you’re new, make sure your target window is open on your desktop so OBS can see it. Otherwise, it’s pretty pointless.

Step 2: Select the Window Capture Source

Click on your new Window Capture source in the sources list. When you do, a red border should appear around the window preview. That’s your cue that it’s selected and ready for resizing. Sometimes it’s a bit tricky because if the window is minimized or hidden behind other windows, you won’t be able to resize properly. So, double-check that it’s actually visible on your screen—been there, done that.

Step 3: Resize the Window Capture

Now, hover over one of the corners or edges of that red border. Your mouse should turn into a resize arrow. Click and drag inward to make it smaller or outward to enlarge. On some setups, this is kinda quirky—sometimes the preview refuses to resize smoothly the first time, but closing and reopening OBS often fixes that. The goal is to get the window just right, fitting your scene without taking up endless space.

Step 4: Maintain Aspect Ratio While Resizing

If you want to avoid messing up the proportions—that weird stretching or squishing—hold Shift while dragging. This toggles “keep aspect ratio,” which is super useful if your content needs to stay proportional (like game screens or faces). Of course, because Windows has to make everything kludgy sometimes, this might behave oddly on a rare machine. Just toggle the Shift and see if it works for you.

Step 5: Reposition the Window Capture

Besides resizing, you might want to move the captured window around the scene. Just click inside the red border and drag it where you want. This helps when juggling multiple sources—like camera feeds, overlays, or notifications—so nothing overlaps awkwardly. In some cases, you’ll need to unlock the source (right-click, then choose Unlock) if it’s locked from accidental moves. It’s all about tidying up that layout.

Extra Tips & Common Issues

Here’s where things get weird sometimes:

Make sure the window isn’t minimized or off-screen—OBS can’t capture what it can’t see.
If you can’t resize or see the expected capture, try closing OBS and booting it again. Sometimes, the source just bugs out after updates or system changes.
If the capture refuses to update, delete it and re-add. Or check if your window is set to “Always on top”—that can interfere.
On some machines, toggling the “Capture cursor” option in the source settings helps make things more visible or less cluttered.
If you want to lock the size so it doesn’t accidentally get resized later, right-click the source and pick Lock. Not foolproof, but better than nothing.

Conclusion

Once you get the hang of dragging that red border, resizing your window capture becomes second nature. Just a little finesse, and your layout will look much cleaner. Mastering this quick trick seriously upgrades your streaming game from amateur hour to polished presentation.

Frequently Asked Questions

Can I resize multiple window captures at the same time?

Nope, not in OBS. Each source has to be tweaked individually, which can be a pain if you’re doing a complex setup.

What if the window capture isn’t showing correctly?

Check if the app window is still visible and not minimized—you’d be surprised how often that’s the cause. Also, try re-adding the source or toggling “Capture Cursor” — sometimes the simplest fix is just toggling a setting or restart.

Is there a way to lock the size of a window capture?

You can lock it via right-click and selecting Lock. That way, you won’t accidentally resize when clicking around your scenes. Kinda handy.

Summary

Use the red border and drag to resize window captures
Hold Shift for maintaining aspect ratio
Reposition by dragging inside the border
Double-check the window is visible and not minimized
Lock the source to prevent accidental resizing

Hopefully this shaves off a few hours for someone. Because of course, OBS has to be just complicated enough to make simple things like resizing a pain sometimes.