run actions at the same time

I have a short question.

Is it possible to have two actions happening at the same time. I want to have some of my characters a little introductionary conversation, and while character X talks, character Y should be entering the szene. Momentarily X talks and then Y enters the szene, because I listed the actions like that in the actions tab.

also I am a Lua-Noob, but if it works with that I would be willing to learn some parts of that too.

Thanks in advance!

Order also matters, so if you were to use non-background display texts/narration text action parts, take into consideration that they pause the action list in the action block that they are located in until they end/or are manually skipped.

Alternatively, you can create "called by other action" actions that you can rename & call as needed, so something you could do is create one of those & then call it just before you create the display text action part, & because it's a different action block, it should carry on in the background without waiting until the display text ends.