Am I missing something but why hasnít the brush size got a slider instead of keep entering the size on the key board? Iím using a iPad Pro 12Ē with pen. I found it slows things down to keep bothering sizing the brush this way, Iím so used to having a slider and does it act on pressure so more you push the bigger the stroke? The colour it done in a slider way and simple to use, but that brush size thing is not making me bother using this app..