Hi
Thanks for question. Let me explain a bit:
All Transform values are applied as a post-effect.
If You are in
Custom Edit mode and Your
Random Transforms are enabled, then
Reset Size button wont work:
You need to
"bake" transforms to items and disable Random Transforms. This can be done with
one button click "Store Random"Then Reset Size Button will work as expected- reset Items size to original geometry size:
To reset rotation as well You can run this script:
for each in ($.trees.getSelected()) do $.trees.setRotation each [0,0,0]
$.trees.update()
Hope this explains how FP works a bit and You can find a solution in Your workflow.
Have a great week.