At the onset, the view in the preview pane is empty and the Auto-Refresh option is "on".

With the option checked, select a data channel to grid, and the output grid calculated with the current gridding parameters is displayed in the pane. The toolbar buttons will become enabled. Hovering the mouse over the view will display at the bottom of the pane the coordinate system as well as the X, Y, and grid data values at the cursor location.

While generating the grid preview (e.g., when the Krigging method is selected), an informational message will be displayed in the centre of the Grid Preview window, which will have 80% transparency applied. To speed up grid previewing, you may want to increase the cell size or reduce the grid extents.

The grid preview is regenerated every time the data to grid selection, the cell size, or any of the parameters under the Extents and Data and Interpolation tabs are changed.

If you want to make changes to any parameters without triggering a redraw/refresh of the grid preview, un-check this option (Auto-refresh) and the preview generation will be paused (the preview grid remains frozen/paused in its last state). When selecting back the checkbox, the preview window will reflect all the changes made to the gridding parameters while the checkbox was deselected.

Script Parameter: GRIDDING_TOOL.AUTOREFRESH [0 – disabled; 1 – enabled]

Use this button to toggle the data point locations on/off.

• When the button is active, the locations of data points are displayed on top of the grid as black scaled circles.
  All the X, Y point locations in the database are shown on the preview pane regardless if a mask channel is applied or not to the gridding parameters. This will allow to not only see the effect of the mask channel but also to see the data that is being excluded by that mask.
• When the button is deactivated, the locations of the data points are no longer displayed.

Use this option to measure the distance between points on the grid. With the cursor changed to a cross-hair, click the left mouse button to locate the starting point. Then, click the left mouse button again to locate the ending point. The distance (in units of X, Y data) is displayed in the lower right corner of the preview pane.

Click this button to move around in the view. Click the left mouse button and while holding the button down, move the hand cursor to pan around the current grid area.

Click the button to activate the option: using the mouse cursor, draw a box around the desired area, then release the cursor to zoom to the selected location. Click the Zoom to Full Extents button to return your zoomed image to the original full size.

Click this button to zoom in and out of the displayed view: use the scroll wheel on your mouse or the mouse left button to click and drag in and out of the view. The preview window will resize proportionately in both directions (when zooming in/out). Click the Zoom to Full Extents button to return your zoomed image to the original full size.

Click the button to display the whole grid area in the preview pane.