It's like a PictureBox, but it supports multiple layers of images, and doesn't die when you try to update it in realtime.
Before doing anything add the layers you want, either using AddLayer(Image)/AddLayer(Image,Point)/AddLayer(Layer) to add existing images, or AddLayers(int) to add dummy layers that you can fill in later.
If you're using the control as an editor with a visible mouse, or just something where images will probably be going "off screen", you'll want to call LockCanvasSize() to stop the control from resizing all over the place.
Alternatively, you can lock it yourself by using the CanvasSizeLocked property, and the CurrentCanvasWidth/CurrentCanvasHeight properties.
If you want scrollbars, just put this control inside a panel that has AutoScroll set to true.
The CanvasSize represents how big an area you have set aside to display things. It will always return the "real value" in pixels, not the scaled size according to CanvasScale.
Changing the CanvasScale will always update the Width and Height of the control, regardless of other settings. AutoSize/AutoSizeMode does control all other size changes however.