Description - It looks like the dataset preview overlay has been designed for large monitors and/or large resolutions. However, on a standard laptop screen, the preview overlay's table needs a lot of scrolling, and that causes the table's headers to be gone from the view.
Why is this feature important to you - There is a lot of unnecessary scrolling to identify the column names (need to scroll up and down repeatedly).
How would you like the feature to work - Freeze the table headers to the top of the table, so that scrolling down still allows the column headers to be seen.
Current Behaviour - see screenshots: