To open the dialog at the top you can just press Shift+P I do not know of any other way to open it except tools - transform - perspective
If, you click on the perspective tool in the toolbox however, you will always get a tool options dialog open automatically
I am not sure if the linux shortcuts are the same or different from windows
If, you click on the perspective tool in the toolbox however, you will always get a tool options dialog open automatically
I am not sure if the linux shortcuts are the same or different from windows