there are some button to inverter color, or effect negative ( black in white.... white in black ) ?
I see some posts, but i think very hard, some can show me way step by step or ir video in youtube ?

I think friends of Inkscape would be in button fast in direct to it... how in corel.
efect up, i did in lunapic very fast.
thanks
pleasy help me.... i like a lot of inkscape.