Not able to select multiple objects in the import module

[kosta]

Hi, I am referring to the "Data Loading Workshop" video from https://www.validity.com/video-hub/ .

In there you can see how the guy is selecting multiple salesforce object to match for the upsert operation. 
I also have seen other users being able to do so. Unfortunately I am not able to select multiple object. In my case I would like to match to contacts, then accounts, then leads for my upsert from a import file. 

Has this been removed or am I missing something? 

Thanks

[kosta · Accepted solution]

Already solved the issue: you have to select the "Match Conditions" option, which was not selected by default in my case for some reason.