Indeed, i have level slider though x2-x8 and three boxs.
1st : Use App settings
2nd: Morphological filtering [ticked]
3rd: Drop down box: Filter 1:BOX 2: Narrow-tent 3: Wide-tent 4: edge-detect.
Also, i have no clue what am doing right now, this is the first ever time i have had an upgrade for my PC ^.^