I am using Qgis 3.10 on windows. I have created a shapefile of geotagged photos using the 'Import photo's' plugin. This gives me a map with an icon at the location of each photo. The attribute table has a filepath to the location of the photos and a relative filepath.
I want to replace that icon with a thumbnail of the photo. I have found some questions about this but none of the answers tell me fully how to do it step by step. I have changed the symbology to 'Raster image marker'. I think I need to use 'Data defined override' to point to the image location somehow, but can't work out how.
I need a simple method that can be used by lots of people in an organisation that only occassionaly use GIS.