Select either time or depth based on the following:
Time to modify the transit values through the selected depth zone. The change in the sum of all the transit time changes must equal the desired stretch/squeeze value.
Depth to stretch or squeeze the selected depth range to the thickness defined.

Type the desired thickness of the zone defined above after stretching or squeezing. If the value is less than the difference between the start and stop depth, the log will be squeezed. If more, the log will be stretched.

Type a value by which to adjust the transit times for the zone defined above.

Type the distance over which to taper the change. A transit modification must be tapered to avoid creating new reflection coefficients at the top and bottom of the stretch/squeeze zone. GeoSyn uses a linear taper at the top and bottom of the zone where the correction starts at zero and tapers up to a calculated value, then tapers down to zero again. The length of the taper is reported in depth samples and is the sum of the top and bottom tapers.

Type a depth range over which to taper the change and click Update.
Click either Top or Bottom to select the absolute top or bottom of the log, or click All to select both.
Click Depths from Tops and select the top and bottom of your zone of interest using formation names.