How to hide the record thumbnail in the portal

Go to Portal Tables.

Click on the table for which you want to remove the thumbnail.

If your views are set to use custom view settings (under View Type in the view's configuration), change the following settings for each view. Otherwise, adjust them under Default View Settings in the Views section of your table settings.

Make sure the View Type is set to either List, Gallery, or Kanban.

Scroll down to find the Thumbnail setting.

Select No Thumbnail.