Expression

The Expression area shows the numeric values and the expressions used in a calculation. You can add values and, in Advanced mode, you can add expressions by selecting a category and choosing a function.

Input:

Lets you choose file data and specify the layers of a file.

Browse:

Opens the File Selector window.

Channels and Bitmaps:

Lets you choose a channel or bitmap from the list for the expression.

Attributes:

Lists the attributes in the data.