How do I adjust the width and height of the columns and rows in matrix questions?

The column widths are driven by the text content used for the column titles. The remaining space is then allocated to the width of the row titles.

To adjust the spacing in a matrix question, try changing the titles used for the columns.

For instance, if you use very short column titles such as 1, 2, 3, 4 and 5, that will leave more space for a longer row title. You can then include as a part of the question content instructional information about the scale (e.g. "On a scale of 1 to 5 with 1 being Strongly Agree and 5 being Strongly Disagree...").