Top of camera controls

The back of the CD300 has controls which will be familiar to those who've recently read my DSC-S75 review, indeed the primary difference is that these controls have been pushed over to the right hand side (and top edge) of the camera to make room for that huge 2.5" LCD. Layout is logical enough even if some of the buttons look as though they've only found themselves there because that was the only space remaining.

FOCUS Manual Focus

Enables manual focus mode, click the jog-dial then roll between focus distances of:

0.1, 0.2, 0.3, 0.5, 0.8, 1, 1.5, 2, 3, 5, 7.0, 10, 15 m or Infinity.
Exposure Compensation

Enables exposure compensation, click the jog-dial then roll between compensations of : (+/-2 EV in 0.3 EV steps)

-2.0, -1.7, -1.3, -1.0, -0.7, -0.3, 0, 0.3, 0.7, 1.0, 1.3, 1.7, 2.0 EV
Spot Meter

Switches metering mode from the default Center-Weighted average to spot metering which only uses a small circular area in the center of the frame for metering. Press once more to cancel.
AE LOCK Auto-Exposure Lock

Locks the metered exposure at the current setting, useful for aiming the camera at the subject to use for metering then realigning the scene for the final shot. AE Lock is cancelled after the next shot is taken.
W / T Zoom / Magnify

Zooms the camera lens towards telephoto (104 mm) or towards wide (38 mm). The zoom control itself is a single position button (non-proportional). In playback mode the zoom control doubles as a control for magnifying the displayed image or displaying thumbnails. Gone is the S75's rocker switch to be replaced by to distinct buttons (better).

Selects flash mode: Auto Flash, Flash Fill-in, Flash Cancel
Image review

Instantly reviews the last image / movie, in this mode you can zoom into the image but not scroll between images on the disc, you'll have to switch to playback mode for that (why it wasn't implemented via the jog-dial I'm not sure).
Macro Focus

Switches between normal; 50 cm (19.7") - Infinity, and macro focus; 4 cm (1.5") - 50 cm (19.7") range.

Engages / Disengages the self-timer. Self-timer is cancelled after the next shot is taken.
MENU Record Menu

Enters record menu (detailed later).

Toggles LCD display mode either live preview with full detail overlay, live preview with simple detail or LCD backlight off. With the backlight switched off you rely on sunlight entering the top of the LCD through the clear window (for me it worked only some of the time, I much preferred the F505/F505V's reflective LCD screen).