I'm new to flash pro CC but I've already worked in flash...
I'm animating a sequence and would like to activate the span based selection but I cannot see all the options in the preferences menu.
How can I get to see all the options in the preferences menu?
(sorry if there are some mistakes I'm french)
Which version of DW are you using? Which OS? Have you experienced this issue before or is this your first encounter?
As a first step, I suggest you try recreating Preferences (Re-create preferences) and see if that helps.