Comments Update! Click here (20 Brush and Painting Tool Shortcuts in Photoshop CC) to see twenty of my favorite tips related to brushes and painting in Photoshop CC in a single post.
All blend modes have their own keyboard shortcut. They all begin with Option (Mac)/ Alt (Win) + Shift + a letter – most often the letter is the first letter of the name, N = Normal, M = Multiple, O = Overlay etc. If you want to quickly cycle through the painting tool’s blend modes, hold the Shift key and hit the “+” (plus) or “-” (minus) to move forward or backwards. Note: If you have a tool selected that is not a painting tool, these shortcuts will affect the blend modes on the Layers panel.