While trying to figure out the curve, i have got tied down to a wierd curve and want to get back to original settings. How do I do it?
And how does one change the curve?

Hi Arun,

- If you just need to revert the brush to its original settings, I'd click the icon next to the opacity slider on the main Toolbar at the top of the window (in Krita 4.2.0 the icon displays two arrows in cycle). Be aware that It will discard all the modifications you have made to the brush preset and restore its original appearance.

- If you want to get rid of the nodes of the curve just drag its nodes away or (version 4.1.5) click one of the buttons at the top of the graph.

Hope it helps