How do you resize icons

I believe the margins within the dock .ini are going to dictate icon sizes relative to dock.

Perhaps someone can enlighten you more.

You could use the OutsideBorder code in the .ini so that icons do not fill whole dock, you would have to do this for all docks. You could also edit png icons by putting them on a bigger transparent background.

Try opening your icons in something like Photoshop that supports transparency and make the canvas around it bigger until you reach the size you want.

The easiest way to do this, without having to edit the icons or make the dock itself bigger is to make a png file and call it tileblank.png. This file can be 256 x256 or 128 x 128 and it should contain NOTHING. Place that file in the same folder as the dock background. Open the .ini file and put this right above the [Background] tag, then save and reapply the dock.

[Tile]
Image = tileblank.png
ResizeIconByPercent = 75
OffsetIconByPercentX = 50
OffsetIconByPercentY = 50

the line that says ResizeIconByPercent can be changed to accomadate your dock. The lower the number, the smaller the icon. This works the best of available methods because it doesn't make the dock bigger and more bulky. (A side effect of this technique is that when you are going to change your dock background, you cant see the actual background in the preview window of the OD configuration screen, this isn't a big deal though since it doesn't take any effort to change the background to see what it is)