To search for InDesign files in OpenAsset, enter 'indesign' into the search bar at the top of the page, and select 'File Format' > 'indesign'.

Alternatively, you can select 'File format' from the 'Search by' drop-down menu.

Enter 'indesign' into the following window that appears on screen and select 'Add to Search'.

The search results will display thumbnail previews taken from the first page of the InDesign documents.