GC Image Users' Guide

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Questions about graphics in GC Image.

What graphics tools are available in GC Image?
How do I draw and edit a point?
How do I draw and edit a polyline?
How do I draw and edit a rectangle?
How do I draw and edit a polygon?
How do I add or delete a vertex from a polyline or polygon?
How do I configure graphics display settings?
How do I select a graphic?
How do I select all graphics?
How do I set and edit graphic(s) metadata?
How do I delete a graphic?
How do I export graphics?
How do I import graphics?

Answers to questions about graphics in GC Image.

What graphics are available in GC Image?
GC Image supports point, polyline, rectangle, and polygon graphics. The Image Viewer palette contains a button to set the cursor mode to graphics and a pull-down graphics mode selector. The selectable graphic cursor modes are:
- Select Graphic - Select a graphic.
- Edit Vertices - Add or delete a vertex.
- Draw Point - Draw a point.
- Draw Polyline - Draw a polyline.
- Draw Rectangle - Draw a rectangle.
- Draw Polygon - Draw a polygon.
How do I draw and edit a point?
Step 1: Set the cursor mode to draw a point mode from the graphics cursor mode selector on the Image Viewer palette.

Step 2: Click at the desired location. After the click, GC Image will revert to select a graphic mode with the drawn point selected.

Step 3: Click-and-drag on the point to move the graphic.
How do I draw and edit a polyline?
Step 1: Set the cursor mode to draw a polyline mode from the graphics cursor mode selector on the Image Viewer palette.

Step 2: Click the left mouse-button at each knot of the desired polyline, except double click at the final knot to end the polyline. After the polyline is ended, GC Image will revert to select a graphic mode with the drawn polyline selected.

Step 3: Click-and-drag any knot handle(s) of the polyline to adjust points. Click-and-drag on the polyline to move the graphic.
How do I draw and edit a rectangle?
Step 1: Set the cursor mode to draw a rectangle mode from the graphics cursor mode selector on the Image Viewer palette.

Step 2: Click-and-drag from one corner of the desired rectangle to the opposite corner of the desired rectangle. After the mouse button is released, GC Image will revert to select a graphic mode with the drawn rectangle selected.

Step 3: Click-and-drag any corner handle(s) of the rectangle to adjust size. Click-and-drag from the interior of the rectangle to move the graphic.
How do I draw and edit a polygon?
Step 1: Set the cursor mode to draw a polygon mode from the graphics cursor mode selector on the Image Viewer palette.

Step 2: Click the left mouse-button at each vertex of the desired polygon, except double click at the final vertex to close the polygon. After the polygon is closed, GC Image will revert to select a graphic mode with the drawn polygon selected.

Step 3: Click-and-drag any corner handle(s) of the polygon to adjust shape and size. Click-and-drag from the interior of the polygon to move the graphic.
How do I add or delete a vertex from a polyline or polygon?
Step 1: Set the cursor mode to edit vertices mode from the graphics cursor mode selector on the Image Viewer palette.

Step 2: To delete an existing vertex of a polyline or polygon, click the left mouse-button on the vertex to be deleted. To add a vertex on an existing segment of a polyline or polygon, click the left mouse-button near the middle of the segment; then, set the cursor mode to select graphic mode and move the vertex to the desired location.
How do I configure graphics display settings?
Step 1: Select Configure Settings from the Configure menu of the Image Viewer. GC Image launches a pop-up with various configuration dialog panes.

Step 2: Select the Graphics Display configuration pane.

Step 3: Set whether to show graphics in all states or only in graphics cursor mode, set the color for drawing graphics, then click the OK button.
How do I select a graphic?
Step 1: Set the cursor mode to select a graphic mode from the graphics cursor mode selector.

Step 2: Click on the existing graphic to be selected. Select additional graphics for the selection set by holding the control key during the click of the left mouse-button while the cursor is on the next graphic to be selected. GC Image will place handles on the selected graphic(s).
How do I select all graphics?
Step 1: Set the cursor mode to select a graphic mode from the graphics cursor mode selector.

Step 2: Select Select All item from the Edit menu. GC Image will select all graphics.
How do I set and edit graphic(s) metadata?
Step 1: Select one or more graphics using the select graphics cursor mode.

Step 2: Click the right mouse button. Depending on how many graphics are selected, GC Image launches either a pop-up metadata dialog for a single graphic or a pop-up metadata dialog for multiple graphics.

Step 3: For a single graphic metadata, set the desired name, description, inclusion flag, exclusion flag, text object flag, CLIC expression, multi-spectrum, and/or color. For multiple graphics metadata, clear the names and/or set the desired descriptions, inclusion flag, exclusion flag, text object flag, and/or color. These settings are described in chapter Graphics.
How do I delete a graphic?
Step 1: Select the existing graphic(s) to be deleted.

Step 2: Click the Delete / Exclude Object button. Confirmation is required.
How do I export graphics?
Step 1: Select Export Graphics from the File menu of the Image Viewer. GC Image presents a pop-up dialog box for specifying the destination file.

Step 2: Specify the destination file, then click Save.
How do I import graphics?
Step 1: Select Import Graphics from the File menu of the Image Viewer.

Step 2: If graphics are present, GC Image prompts the user to overwrite or append to the existing graphics. Then, GC Image presents a pop-up dialog box for specifying the source file.

Step 3: Specify the source file, then click Open.

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