You can reach the form "Perform at machine" via "Client" - "Administration" -> "System settings" -> "Internal Activities" -> "Perform at machine". Here you will be able to choose a specific machine and then you will see what Internal activities will be available for that machine.
When you have picked the Internal activities that you want you will also be able to see which other machines can run the same Internal activity and pick them as well. When you are finished with the selection in the menus you click on "Update" to confirm them and then the system will show warnings when these Internal activities are performed. This is done in order to make sure that the active user does not miss the Internal activity as well as to make sure that the active user has the proper clearence to perform the Internal activity.
You can see a picture of the form below. It is important to know that these selection will affect what is shown in the form for "IA Machines" which you will find via "Client" -> "Left side menu" -> "IA Machines", and here you can read more about how that form works.
Machine
Here you select the active
machine.
Type
Here
you select the type of internal activity you want to run.
Machine
Here you can select if
any other machine/s should run the internal activity as
well.
Update
When you are done with your choices you press this button to save
them.