I have the same issue.

We solved this by dragging the dividing line (between the questions and the response options) further left. This forces the questions to word wrap in a shorter space and gives more room for the response options.

I changed the font size of the scale points (moving the divider works and changing the font size of the statements too) until it fit with scrolling.

I am also looking for a solution for this issue. I made the text smaller and that helped a little bit, but it wasn't quite enough

You can use the code provided by LibertyW : .Skin .QuestionOuter.Matrix{ max-width: 100%; }
For using it, use the "Custom CSS" option in the Look & Feel section --> Style

https://community.qualtrics.com/XMcommunity/discussion/comment/41374#Comment_41374The code does not work for me, do I need to change something else?

https://community.qualtrics.com/XMcommunity/discussion/comment/43677#Comment_43677I'm experiencing the same issue. This code looks helpful but does not work in my case to widen/increase the viewability of the matrix table and eliminate horizontal scrolling.

Found a solution! 

To increase the width of your matrix table so that it employs more of the actual screen space, go to look and feel → Style → Custom CSS

Then copy-paste the code at the end of this message.
I’ve simply added “!important” to the code provided by LibertyW a few years ago. Seems to work nicely in my survey. 
-----------------------------------------------------------

.Skin .QuestionOuter.Matrix {
    max-width: 100% !important;
}


 

@Jlad Thank you this works for me

.Skin .QuestionOuter.Matrix {
    max-width: 100% !important;
}