Like in most other layer-based illustration software you can group layers in Paragraphic. This allows you to easily select and move or transform layers together like you expect.
However, in Paragraphic you can also do much more with layer groups, as you can add nodes to these groups just like you can in other layers. And these nodes will then act on the group of output elements generated by the layers in the group.
An example of this functionality is presented in this video, or you can read about them more in depth below.
Adding nodes to group layers
After grouping some layers, in this case a number of instances of a flower group, you can just select the group layer and add a node to this group.
Adding nodes to the group will apply these node changes to the output generated by the group, but this does not modify the original layers. This means you can add/remove or tweak any effects to the group layer nodes non-destructively without any change being applied to the original layers.
For example you could add a Randomize node to randomize the rotation of the flowers in our group, and an Apply function node to scale the flowers based on their position within the group to create a scale gradient.
While you have these nodes applied you can still also edit the individual flower layers freely, for example moving or rotating them manually. And as you do, the automatic scaling and rotation will be applied as well.
In other words this lets you combine the flexibility of manually being able to place and move layers with power of procedural nodes.