How can I change tileset with event?

Hi.
First I am not a English native language. Be patient!

This is my problem:
During the game, I need change some element in the map. For reach this, I make a copy of map and add changes. With events I bring the hero in the map modified. This mean double work and double problems or errors.

Is there some easy way?

Tutorials is where you post tutorials (= step-by-step guides), not where you ask for help.

I've moved this thread to MV Support. Thank you.

What exactly is this element you need to change?
This seems something that can easily be solved with switches!

Edit: oh, if you mean something on the map itself(first layer), why not use common events to call upon whatever event needs to be done in the map?

events will only allow you to show B through E tiles.
if you want to change something related to the A tiles, you gonna have to make a custom tileset containing that edit, and load it onto an event.

would help if you showed us a picture of how it looks like.

There are several ways to change the map, each having different advantages and disadvantages.

Which way to use depends in what the changes are - minor changes are best ddone with events, bigger changes sometimes are best with different maps, sometimes with redirects and sometimes with scripts/Plugins.

For better help we would have to see an example or a description of the changes.