Since there is (still) no easier way to change the global tempo of a project in relative terms, I would like to use the Projekt Logical Editor for this.
Here is a simple tempo track with a few events as an example. I want to reduce the tempo of the entire track - let’s say - to 75%.
In the Project Logical Editor I set the following.
All tempo events are adjusted properly except the first one! This is a bug in my opinion.