sprites

When adjusting alpha on a pixel from the color picker it's quite easy to "whiff" the alpha bar and replace your current color with black because the SV box's area for some reason extends several pixels below the alpha bar's. Demonstration in the below image:

I'd recommend the alpha

Sometimes when changing image/document size you want to make it twice as big, or twice as small, or something similar. It would be useful to have an option to do this easily. One way to implement this would be making a dropdown with different units (pixels, percents/fraction, other can be added as well later)