Simply going to pool settings and increasing the composer disk size doesn't change the disk size for already provisioned machines. Recomposing the pool machines also doesn't work.
What are the steps to increase the disk size as I set it too low for the windows swap file to be created on it. Do I have to delete the machines and recreate them?
I don't think there is an automated way to do this once the machine has been created other than a delete of the machine. You could always try to increase it manually via vCenter and the OS of the desktop. You may also be able to increase it via the vCenter and then recompose the VM but you would have to test it to see if it works.
Just a FYI, this does not change under View 5.1.
Generally speaking, it seems like anything that changes the technical details of a desktop pool cannot be done when it is deployed.
I just wish the GUI would be a little more clear on letting you know if a given change will proprogate to the desktops, and if so what you need to do (refresh, recompose, etc). If neither a refresh or recompose will enable the change I think the option should be locked out once the pool is deployed.