Hi Annika,
You can do this in the Report Designer, but you have to go through specific steps in a specific order. Basically, you'll first be creating a regular report and then adding datasets.
So, create your first report the normal way, with settings, filtering, etc, and then you have to Save the report to be able to continue.
Now, you have a new icon at the top right:
Click on that, and choose Add dataset. Give it a name, fill out the different values for your second report (there will be much fewer choices now, since the second report must be in harmony with the first one). Once you're done, you must again Save in order to see the result.
Now, repeat for your third report, adding another dataset.
Mark Correct & Helpful, if applicable.
Thanks,
Sandeep
