Scene size vs Game size

Hello. My game is sized 700 x 525 pixels. I have many scenes, scenes for dialog text or story, scenes for different levels etc...

I want all scenes to be exactly 700 x 525 pixels wide and high. But somehow it is not possible to set the scenes. It gives me to set number of tiles but when I lower the number of tiles the size of the scene is not 700x525. Also tried to switch to pixels in the properties dialog of the scene but it doesn't work. Somehow the changes are not applied. Is this a bug?

How do I set all scenes to exact size I want, is there an option for this?

Scenes have to be an even multiple of the tile size, so the only way to get that scene size is to change the tile size.

yup I see all tiles are 32x32. Is there an option to change that?

I checked in game settings but nothing seems similar.

You set the tile size of the scene on creation of the scene.

Thanks. Really trivial