i know i can change alpha. But i want it to be transparent. I want, like when i draw a line, and i draw another line ontop i would still be able to see the one under it. but all on the same layer. when you make a drawing into a symbol, then you go to color effect and select alpha and put the alpha to 50%, then you do the same with another object and then put them ontop of eachother. That effect is what i want but by drawing and without needing to change any effects. If you still dont understand, here's a picture of what i want by just drawing with brush.
Great solution! In English it's "Object drawing mode on/off".