Record mode display (Auto record modes)

Here is an example of Auto record mode, in this mode the only items on the Function menu which can be changed are image size and quality. You can select from normal drive or self timer as well as different flash modes, everything else is automatic.

Record mode display (Manual record mode)

Here, an example of information overlay in Manual record mode. FUNC settings are shown down the left of the frame (in the exact same place they are with the FUNC menu displayed), other settings along the top and bottom of the frame. AiAF mode is enabled, otherwise a center AF frame would also be visible.

In this case: FUNC: +0.3 EV compensation, ISO 50, Large / Fine JPEG. Others: Evaluative Metering, Single Drive, Macro Focus, Flash Cancel, Landscape Orientation, Manual record mode, 124 shots remaining.

Here we're already half-pressed the shutter release and are ready to shoot. Automatically selected AF areas turned green to indicate a good focus. Note that unlike the prosumer PowerShot digital cameras the SD100 does not display the actual exposure to be used. After shooting a review is displayed briefly, note that we have chosen the detailed display mode (with histogram). During this review you can press the FUNC (erase) button to erase the image, SET to hold the image on the screen or half-press the shutter release to return to shooting.
Example of movie clip record mode, the number of seconds remaining (>999 in this example) simply refers to the total space, an individual clip is limited to 3 minutes. Here you can see the overlaid FUNC menu. As you move down the menu options the settings for that option are shown at the bottom of the screen, use the left and right arrows to change. The exposure compensation option doubles for long exposure selection (press SET).

Play mode display

Switching to play mode immediately displays the last image taken. Depending on the previously chosen display mode you'll see this (clean image, no info overlaid) Press DISPLAY to increase the information displayed: folder / filename, frame number, image quality / size, date / time.
Press DISPLAY again to switch to the histogram / exposure mode. Here we can see detailed exposure information as well as an exposure histogram. The S400 does not support blinking of overexposed highlights.  

Press the zoom controller to wide to switch to this 3x3 image thumbnail view, use the 4-way controller to browse. Images appear in the correct orientation thanks to the S400's orientation sensor. Note that you can still use play functions in this mode, such as erase.

Press the zoom controller to wide once more to switch to this page by page jump mode, press left or right on the 4-way controller to jump a page nine images at a time.

Just like most recent DiGiC based Canon digital cameras the SD100 has a ten steps of playback magnification from 2x to 10x. Magnify mode is very fast both in the actual magnification and scrolling around the magnified image.

As noted above the orientation sensor means portrait images are displayed correctly. And if they aren't correctly orientated (you had the orientation sensor switched off or took a shot at 45 degrees) you can always rotate images from an option in the play menu.