Level editor selection and camera movement controls have been changed suddenly

Development Getting Started & Setup
,
1

Hi!

First:

Earlier when I have opened level editor and used mouse left button, I could have select multiple objects with rectangle selection.

Then the camera have not been moved anywhere with mouse left button.

If I have wanted to move camera, I could’ve done it by clicking mouse right button and move camera with QWEASD-keys.

Now:

Suddenly mouse left button have started to move camera forward and backward and right button up and down.

I can now only select multiple objects by pressing ctrl + alt keys at same time when I select objects with mouse left button.

I want it back so it would work like in the “First” place.

Thank you for the replies!

2

Hello Nuketuz, I’m going to try to help you.

I suggest checking the “level editor - viewport” to ensure everything is configured correctly.

1 Like
3

Hello @BRGEzeHulton !
Great to hear your reply.
Unfortunately I did not recognize any affect. I tried to also return viewport settings back to default but no effect.

This is very harmful for workflow due to muscle memory already have learned the “correct way” to do it with mouse buttons.

Feels a bit challenge at the moment to figure out what to try.
What should I try next?

4

HI Nuketuz, That sounds really frustrating! I’m here to help, so let’s sort this out together. I suggest you create a new project to see if the same issues with the camera and mouse appear.
If the new project behaves normally, the problem lies in the project-specific settings. If the new project also shows the issue, it’s likely global settings or the OS.

Unreal’s Input the engine reads raw input from the OS (Windows, macOS, etc.). If that raw input is modified or intercepted by another layer (e.g., an updated driver, a “gaming” overlay, or synergy-like software), it can produce abnormal viewport movements in Unreal.

Reset All Editor Preferences (Not Just Viewport)

If only the viewport settings were reset, try **Editor Preferences → General → Reset to Default at the top-right. This clears out any changed preferences across the board. Restart Unreal after resetting.

One more thing that comes to mind is that If a plugin is hooking mouse inputs (e.g., VR or advanced camera plugins), it can override your normal navigation. Temporarily disable suspicious plugins, restart, then see if controls return to normal.

The final step, if none of the previous methods were successful, would be to Reinstall/Repair Unreal Engine (Last Resort)
If none of the above fixes it, consider verifying or reinstalling UE. It’s rare, but sometimes key config files are corrupted.

I hope one of these solutions helps you solve the problem, if not, please let me know.

5

Hi BRGEzeHulton and thank you for your reply! I appreciate it! :blush:

  1. I tried to create new projects (architectural, first person, third person) but all of them acts the same. No effect.

  2. In project, I went to “edit > editor preferences > all settings > general” and clicked “reset to defaults”. After that restarted the unreal engine. Same continues, no effect.

  3. I’ll try next to close suspicious plugins and restart. I tried to disable all audio programs from the windows startup and restarted. No effect.
    Tried to click “verify” in unreal startup and it started to download materials. No effect.
    Now I’m removing Unreal and trying to install it back.
    No, it did not work either. No effect..

6

This is really weird issue!
How should it normally work? Does your left mouse move camera forward and backwards OR does it select objects and change those sizes?

What can I even check next?

7

Typically, when you right-click, you can move using the WASD keys. The left mouse button allows you to select objects, and if you hold it down, you can move forward, backward, or rotate the camera left or right. To select objects more effectively with the left mouse button, it’s best to switch to the top view and make your selections from there.
This is how many of my colleagues use it, which is the default Unreal Engine and with W,E,R you can resize, rotate and move objects.

8

That is how it works now. But it is kind of weird due to left mouse has been working since start (was it 5.0 or 5.1 versio when I started) like I mentioned. It used multiple selections view in current camera view and did not need other views like top-view.