How to undo an action in ADE Assembler?

Hi,
I'm using Virtuoso ICADVM 20.1 and my question is quite easy. In ADE Assembler (or in Explorer) if I accidentally delete an output, an expressions or if I do an action that I simply want to undo, how can I do that?
I've tried searching something in the Cadence help manual, but I haven't found anything useful, because the undo function is only referred to schematic editor. I suppose Assembler does not have this command. Is it possible?