Which file format supports 16-bit color, 8-bit color, indexed color, grayscale, and alpha channels, but not CMYK?

Which type of files can be used as a displacement map on the displace filter?

Which one is NOT included in the purge menu?

Shortcut for Auto Tone?

Which is NOT a texture option on the Underpainting filter?

Maximum positive value you can set for tracking in the Character palette?

Which one is the use for alpha channels?

Under which menu is the Displace option located?

Which one is NOT a category under Preferences?

When the brush tool is selected, how can you change its opacity to 75% by using the keyboard instead of the slider?

What does the Direct Selection Tool do?