With this feature...
Do this...
curve list box
Select the curve to modify.
description
Type a curve description.
mnemonic 
units
Select a mnemonic.
style weight color
Select display properties for the curve.
track left scale right
scale invert scale
Type values for the curve track or click invert scale to reverse the left and right scale values.
offset values multiply by
Type the increment by which to offset (shift) or multiply values.
generate porosity curves
Click to display the porosity
log generation dialog box.