Designing Games with Game Maker - YoYo Games

Once you selected the correct set of images, press OK to create your sprite. Please remember
that you are only allowed to use images created by others when you have their permission or
when they are freeware.
Editing individual subimages
You can also edit the individual subimages. To this end select a subimage and choose Edit
Image from the Image menu. This will open a little built-in painting and imaging program.
Please realize that this is a limited program that is mainly meant to make small changes in
existing images and not to draw new ones. For that, best use a full-blown drawing program
and use files (or copy and paste) to put the image into Game Maker. You can also set an
external image editor in the preferences.
The form shows the image in the middle and a number of basic drawing buttons at the left.
Here you can zoom in and out, draw pixels, lines, rectangles, text, etc. Note that the color
depends on whether you use the left or right mouse button. For some drawing tools you can
set properties (like line width or border visibility). There is a special button to change all pixels
that have one color into another color. This is in particular useful to change the background
color that is used for transparency. On the toolbar there are some special buttons to move all
pixels in the image in a particular direction. Also you can indicate whether to show a grid when
the image is zoomed (works only with a zoom factor of at least 4).