Designing Games with Game Maker - YoYo Games

At the top of the form there is a tool bar. On this you can indicate the size of the grid cells
used for aligning objects. Also you can indicate whether or not to show the grid lines and
whether or not to show the backgrounds, etc. It is sometimes useful to temporarily hide
certain aspects of the room. Realize though that when you are adding instances of objects,
these will always be shown, independent of the view setting.) There are also buttons to clear
all instances from the room and to shift all instances over a number of pixels. Use negative
numbers to shift them left or up. This is useful when for instance you decided to enlarge the
room. (You can also use this to place instances outside the room, which is sometimes useful.).
Finally there is the Undo button to undo the last change to the room and the OK button to
save the changes. (Click on the cross at the top right to close the form without saving the
changes.)
At the left you will see three tab pages (five in advanced mode). The objects tab is where you
add instances of objects to the room. In the settings tab you can indicate a number of
settings for the room. In the backgrounds tab you can set background images for the room.
Adding instances
At the right in the room design form you see the room. At the start it is empty, with a gray
background.