You need to use the controller settings for the game you're playing. You can adjust everything in there.
this post was submitted on 13 Jul 2025
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I do not see a mouse setting within the controller settings, only for actual controllers.
I know for trackpad/joystick/gyro mouse you can definitely adjust the sensitivity, but I'm not sure about adjusting sensitivity for an actual mouse (if that's what you're talking about).
You should be able to do it with steam input
The only place I found anything about steam input was in the properties of the game and then under controller, I can set it to Steam input, but I do not see where I can make any changes to Steam input, and I am not using a controller but a keyboard and mouse.
Once you enable it, you can edit literally anything about your controller setup for that game... There should be an "edit layout" button.
Here, this should help: https://www.reddit.com/r/SteamDeck/comments/woy7lp/steam_input_basic_guide/
The amount of shit you can do is actually kind of crazy, though you don't need to get that deep.
I think mouse and keyboard only works properly in Desktop mode. Not sure if intended or a bug.
My suggestion is to open a support ticket with Valve/Steam. They might help you troubleshoot it, but most likely they will escalate the problem to their dev team as a feature request / bug report.
You used to be able to set the mouse speed on the windows operating system. Sometimes the software you are using overrides this, so maybe check your software settings to see if they made that possible.
You used to be able to set the mouse speed on the windows operating system.
I am running Steam OS on my Steam deck, not windows.
Sometimes the software you are using overrides this, so maybe check your software settings to see if they made that possible.
The game I am playing does not have a cursor speed setting either.
There is no input speed control. Plus I would like something Steam Deck wide and to not have to adjust it in each game.