Hi,
Thank you for your reply but unfortunately it didn’t work with the key modifier.
However, I continued my research and I managed to make it work as follow:
After the click action with the click type ‘Click_down’, I added an action ‘Hover’ with a target in the same window (as Steven proposed)
Then, I attach the destination window and finally I add the click action with the click type ‘Click_up’.
So the trick is to force the Hover within the source window. Steven had written it clearly but I was still pointing the hover to the destination window.
Thank you all for your help.