To change multiple Type layers at one time, select them in the Layers panel and with the type tool selected, change the desired attributes in the Options bar.
When using the Type tool, Command (Mac) / Control (Win) + Shift + L, C, R will align a paragraph left, center, or right. While working with text, Command (Mac) / Control (Win) + M to display the Paragraph panel.
When using the Type tool, Option (Mac) / Alt (Win) + Shift + up arrow or down arrow will increase/decrease baseline shift.
When using the Type tool, Option (Mac) / Alt (Win) + left arrow or right arrow will increase/decrease kerning/tracking
When using the Type tool, Command (Mac) / Control (Win) + Shift + < or > will increase/decrease the point size.
‘<’ or ‘>’ moves to the “previous” or “next” brush in the list on the Brushes Panel. ‘<’ or ‘>’ + Shift goes to the first or last brush in list. (At first glance these shortcuts may appear to be making the brush larger and smaller, but that would be because you’re moving from a smaller to larger brush (or vice-versa) in the Brushes panel).
Holding the Shift key will constrain the painting tools to a straight line. In addition, To have a painting tool connect (draw a line) between two points, click once to start a line, hold down the Shift key and click again to set the end point.
To access the Brushes preset picker while anywhere in the image area, control (Mac)/ right mouse (Win) -click with a painting tool selected.
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.
When using Free Transform, the "Reference Point Location"(or center point) can be changed to determine the location around which transformations occur. You can drag the center point freely within the image area, or set it numerically using the Options bar. This can be particularly useful when trying to align objects or rotate around a point that is off-center.