Filters menu
Distort
Pinch punch filter menu command
Set original point using cursor
Set pinch punch
Set radius
Apply
The pinch punch filter for Affinity Photo can be found in the distort category of the filters menu. The filter is a wonderful distort tool that can be used once or multiple times to great effects. The pinch punch can be used with images as well as resources / presets such as patterns and brushes and fonts / eps designs