Selecting Media Size

This is the maximum size that, ideally, you would like to fill. There are two ways to specify media size:

Select a predefined size: There are numerous options here that will likely suit your needs. Just select one from the dropdown list and it will be used.
Specify size manually: Just type a number into the "Size of Media" box to manually specify a size. Enter it in bytes, kilobytes, or megabytes as you prefer by selected one of the radio buttons that follow.

In addition to using a predefined size and manually specifying a size, you can create custom sizes by entering a new media size in the "Size of Media" box, and clicking Add. Your custom size will be saved for use at any later time.

Next up: Setting Fill Range