Use Transform to condense multiple text responses into a single distribution.
For example, this survey elicit multiple reasons which for analysis we'd like to combine into a single list:
To condense the values, place the elements in a group as above. Press the edit icon for the group and select "Transform..." from the context menu to bring up the transform dialog:
The text responses are now condensed into a single distribution.
This is a multi-value element, so percentages may sum to more than 100%. Below selecting people who chose "Experience" shows they also entered other reasons:
Condense multiple text columns