GIMP Version: 2.8.10
Operating System: Windows
GIMP Experience: Beginner Level

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Hi,

I have noticed that in GIMP's rotation/Unified Transform tools we do not have an input box for values that could help automate actions. Say I want to duplicate a flower petal by 12 times and automatically rotate these duplicates by 5% around the centre.

Or are there some hot keys I need to use for such operation?

Nothing that I have come across

There is a plugin that does something like that. Probably others.

http://registry.gimp.org/node/28647
and
http://www.arakne.es/en/dessign/gimp-pl ... h-updated/

Not perfect but it is quick.
here I adjusted the source layer orientation, added a little 'spot' to prevent an autocrop
I am no expert with this plugin, so I might be missing something there.

dialog looks like this: http://i.imgur.com/7CsOUnY.jpg

result like this: http://i.imgur.com/WfKQNA2.jpg
Set to generate a layer group. The source layer is bottom left.

Multi-Replicate might be worth a look.