The default configuration of the gallery page selects two fields in a single column. These are an image data type and a reasonable second field from the table. Both fields are linked to the show record page or foreign key table page depending on the settings in Application Generation Options. The selected fields may be changed or other fields added.

The header section is not populated with any content by default. If you want content in the header section, then the content and styles should be present in as many columns as the cell is repeating.

In the repeater section, fields are separated using <br /> tags to force each field on a separate line.

In the page total section, just like the header, the content and styles should be present in as many columns as the cell is repeating.