Buttons move and change size when start game,Button object moves when game start

Hi guys,

I’m another newcomer to unity.

I have this in my hierarchy :

Canvas → Panel → buttons with text

When I click on start (with option Maximize on play) the sizes and positions of the buttons change.
If I go to the game tab without starting the game, the buttons don’t move.
I don’t have any animations scripts, just methods to go to another scene or quit the game.
Any ideas ?

@Mags59 Maybe change resolution to Free Aspect (It’s in “Game” tab very close to maximize on play option) then test your game, If Buttons is also changing the size, change the size of canvas and buttons (you can also create the new canvas and add all buttons to it and resize them) I also have similar problem.