Switch images out on every frame?

[GameMaker2019]

Ok, I need to know how to switch images out correctly.

Example, I have my game in a folder called "MYgame". The mmf game files and all images are in that folder. So when I add a new active object, I pull the image from the one in that same folder.

Now, let's say I have 50 levels. Some of the images are the same on each level. I decide I want to replace those images. I go into my "MYgame" file and drop in new images named the same as the old ones (to replace them), but it doesn't change them in game.

I find myself having to go into the game and double click each image and re-choose from my files the new image...on every level.

Is there a way to replace images with new ones more easy?

I am making my game for IOS.

Thanks

[GameMaker2019]

OK, so I was playing around with all of this and tried something.

If I go to my first frame and tell it to make an active object a "Global Object" (under memory options) and then I switch the picture, it switches out on all frames.

Now, before I go do this, will this have any other effect on the game....?

Thanks