I have a renamer preset Test-1 as shown in "renamer presets.jpg".
Everything works fine.
I have included this preset as a favorite under Fatvorites -> Apllications.
When I select photos and run Test-1 in Favorites everything also works fine.
Now I wonder if it is possible to automatically set the Global Sequence always to 1 before running Test-1, so that the numbering always starts at 1.
No. The global sequence number is intended to provide a global, self-incrementing source, e.g. to ensure your file names have unique numbers.
If you always want to start at 1, use Step Types -> File Number (https://www.photools.com/help/imatch/ren_basics.htm?dl=h-22)
Thanks for the tip