On the old NI Forum I found this Information (https://www.native-instruments.com/forum/threads/creator-tools-slider-image-issue.459931):
Has Alpha Channel: yes
Number of Animations: 256
Horizontal Animation: no
Vertical Resizable: no
Horizontal Resizable: no
Fixed Top: 0
Fixed Bottom: 0
Fixed Left: 0
Fixed Right: 0
I wonder where this knowledge is coming from.
The Creator Tools manual doesn't provide such informations: https://www.native-instruments.com/fileadmin/ni_media/downloads/manuals/kontakt/KONTAKT_1_2_0_Creator_Tools_Manual_2020_03_24.pdf
Also searching for "Creator Tools" on NI's website doesn't help: https://www.native-instruments.com/de/catalog/?q=creator%20tools&t=global
If I search for "Kontakt" and go to the "Building in Kontakt" section I get this page: https://www.native-instruments.com/de/products/komplete/samplers/kontakt-6/building-in-kontakt
Which also doesn't provide a lot of infos about Creator Tools.
Also the latest Creator Tools manual under the Section "Downloads" (https://www.native-instruments.com/de/products/komplete/samplers/kontakt-6/downloads) / Creator Tools manual 1.4 (https://www.native-instruments.com/fileadmin/ni_media/downloads/manuals/kontakt/KONTAKT_CREATOR_TOOLS_1.4_Manual_English_17_02_2022.pdf) doesn't provide those infos.
Also the Creator Tools online manual doesn't provide those infos: https://www.native-instruments.com/ni-tech-manuals/creator-tools-manual/en/welcome-to-creator-tools
Best,
Dirk