Undo - Selecting the Undo option undoes the last operation you performed within the Terra Editor window.
Redo - Selecting the Redo option repeats the last operation you performed within the Terra Editor window.
Note: DreamScape's native Hold and Fetch functions both refer to the file [DRIVE:]\[MAX DIR]\autoback\Dreamscape.hld.
Hold - Holds the generated grid to a file.
Fetch - Fetches the generated grid from a file to Terra Editor.
Crop Selection - Clicking Crop Selection takes a selected portion of an existing height map for the Terra landscape and scales it up so that it becomes the entire height field and fills the entire preview window. In order to use this option, you must select a portion of the grayscale map that makes up the existing Terra height field.
Clear All - Erases the entire Terrain. You will be prompted prior to the deletion.