I have an issue with the fill. I like the way that some thing change right when I'm changing the color but most times. I can change a simple box to red and the screen goes black, the computer is thinking, I can go get coffee, check mail on iPhone and come back 5 actual minutes and its still sitting there.Is there a way to turn the magic off? Where I can open the fill box, change the color and when I close it, its there. Not automatic. It take a really long time for the color to "happen" on the screen.
BEar in mind that an image such as a jpg or png is compressed, the moment you import it into Draw you have a full uncompressed version of that file, approx 10x the size in memory.
Consider working with externally linked images if you are not going to edit them much in Draw. Externally linked images will display at 45dpi on screen and be a much lower memory overhead. You can edit the image externally in an image editor and have the changed reflect in the Draw document.