How to copy a filter
If you want to create a new filter based on an existing one you can do that by saving the filter under a new name and then changing it.
Click on the filter you want to copy.
Click on the … button on the right of the name of the filter and then click on Duplicate
A modal will open. Here you have to give the copy of your filter a name. Then click on Save.
The copy of you filter has been created and can be customized now.
The names of your filters must be unique. In case you pick a name that is already taken the modal will stay open and you will be prompted to chose another name.