Pixel snapping

You can turn on pixel snapping using the Snap to Pixels command in the View menu. If Snap to Pixels is on, a pixel grid appears when the view magnification is set to 400% or higher. The pixel grid represents the individual pixels that will appear in your Flash application. When you create or move an object, it is constrained to the pixel grid.

To turn pixel snapping on or off:

Select View > Snapping > Snap to Pixels.
If the magnification is set to 400% or higher, a pixel grid is displayed. A check mark is displayed next to the command when it is on.

To turn pixel snapping on or off temporarily:

Press the C key. When you release the C key, pixel snapping returns to the state you selected with View > Snapping > Snap to Pixels.

To temporarily hide the pixel grid:

Press the X key. When you release the X key, the pixel grid reappears.