In your admin.py file, you can customize the presentation of models.
class YourModelAdmin(admin.ModelAdmin):
list_display = ('id_proveedor','anio','mes','fecha','fecha_mod','contacto','usuario','obs')
list_display_links = ('id_proveedor','anio','mes','fecha','fecha_mod','contacto','usuario','obs')
list_filter = ('id_proveedor','anio','mes')
ordering = ['id_proveedor']
search_fields = ('id_proveedor','anio','mes','contacot')
list_per_page = 10
admin.site.register(YourModel, YourModelAdmin)
You can configure for which fields you want to search, fields that you want to display, organize, etc.