Canon CHDK - Manual (Page 26)

Auto magnify Enable [•] / Disable [ ]
N.NNx in on-screen display. Another tool for controlling the scaling of the histogram. This
option will magnify the Y-axis (vertical) if less than 20% of the histogram area is filled. The
purpose of this function is to make the histogram easier to read when there are very tall peaks.
This function lies somewhere between the Linear and Log options above. A red dot over a peak
indicates that it’s been clipped due to the magnification. The amount of magnification applied is
displayed over the histogram.
No Magnification
With Magnification
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Show Histo Ev Grid Enable [•] / Disable [ ] < Histogram parameters < Main Menu
Adds 4 or 5 vertical lines to the histogram dividing the histogram by full stops.
EV Grid Enabled
Zebra parameters
< Main Menu
Zebra is a feature that indicates over and under
exposed areas of the scene. When the shutter is half-
pressed, the areas of the scene that are under or over
exposed will turn red. The zebra effect can also be
applied to existing images by half-pressing the shutter
during playback mode.
Draw Zebra Enable [•] / Disable [ ]
Enables the drawing of over / under exposure indicators.
Zebra mode [Blink 1, Blink 2, Blink 3, Solid, Zebra 1, Zebra 2]
Determines how the over / under exposed areas will be indicated.
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