Version: Odoo 11
In the openacademy tutorial, there is this block code in the xml file:
<act_window id="launch_session_wizard"
name="Add Attendees"
src_model="openacademy.session"
res_model="openacademy.wizard"
view_mode="form"
target="new"
key2="client_action_multi"/>
Where can i find more information about key2 parameter, its possible Action Event values and what do they do ?