[Solved] Design: How should I mark Map Switch?

[konyvfalovb]

Again, I am making a campaign where certain maps contain submaps. Okay, the game cache is fully working, however, I simply don't know how should I mark the regions' borders. I don't want to make "surprise map switches", which means you can "accidentally" go into a region which loads another map but you don't see the region.
How should I mark these regions?
And how did they change the position of a Doodad like the force wall in Rexxar's campaign (I think the force wall destructible has been modified and its Y (or Z?) has been lowered and so you could only see the top of it)?

 

[Maker]

I suggest using a special effect or a destructable like the force wall.

You can lower objects by selecting it and holding Ctrl + Page Down.

Set the pathing texture to none to freely rotate it.

 

[UndeadImmortal]

Circle of Power would do.

 

[konyvfalovb]

Thank you, I'll use both. There are areas which you have to exactly find and there are wider paths like the road to Stratholme.