I am using odoo 11.

I managed to add a custom option in the 'Action' dropdown menu for a specific model (see https://www.odoo.com/forum/help-1/question/how-to-add-an-option-to-the-action-drop-down-menu-in-tree-view-140095):

<act_window id="action_set_invoice_done"
            name="My menu name"
            src_model="openacademy.course"
            res_model="openacademy.course"
            view_type="form" view_mode="form"
            key2="client_action_multi" target="new"
/>

Is there a way to let that option appear only in a specific kind of view?

In other words: i'd like the option to appear only in treeview, after i select some records. Or the other way around: i'd like it to only appear in the formview when i'm in the details of a specific record.

Thank you very much in advance for any help!