There may be a requirement of showing more columns (horizontally) like table in a vertical gallery, by default vertical gallery will not offer horizontal scroll to show more details.
But there is a workaround to achieve this. Refer below for the steps:
Tree View:
Output:
After making above changes, horizontal container shows horizontal scroll which will look like in-built horizontal scroll in vertical gallery.
Note:
Make sure to have same width for header and gallery elements to properly aligned like a table.