The following descriptions for modifying graphics data refer frequently to the image. Keep in mind that the image may be the main image, the full resolution image, or the zoomed image. Also, the user may switch between the different images at any time while in the process of modifying graphics data.
Next, the edit mode must be selected. There are 3 edit modes available:
Described below are the instructions for editing each type of graphics data in each of the 3 modes.
Modifying Point Data:
The point to be modified is selected by clicking the left mouse button near the point. The point selected is marked with a small square the color indicated by the handle color. The only modification option valid for a point is move.Modifying line or polygon data:
The line or polygon to be modified is selected by clicking the left mouse button near one of the vertices of the line or polygon. Each vertex of the selected line or polygon is marked with a small square the color indicated by the handle color. The user may now add new vertices, move existing vertices, or delete vertices.Modifying rectangle data:To add vertices, click the middle mouse button near the vertex after which the new vertices are to be added. Outline or shadow lines indicate the 2 vertices the new vertices will be added between. Clicking the left mouse button indicates the location of each new vertex, the middle mouse buttons deletes the last vertex selected, and the right mouse button indicates the user is done adding vertices (much like in select mode).
To move a vertex, click the left mouse button near the vertex to be moved. Clicking the left mouse button on the image indicates the new location for the vertex.
To delete a vertex, click the left mouse button near the vertex to be deleted. The portion of the line or polygon affected will be redrawn with the vertex removed.
The rectangle to be modified is selected by clicking the left mouse button near one of the vertices of the rectangle. Each vertex of the rectangle selected is marked with a small square; the color is indicated by the handle color. The only modification option valid for a rectangle is move. Click the left mouse button near the vertex to be moved. Moving one vertex on a rectangle will move other vertices as well as maintain the rectangular shape. An outline indicates the extent of the new rectangle. Clicking the left mouse button on the image indicates the new location for the selected vertex.For all types above, clicking the right mouse button indicates the user wishes to move the label. An outline of the extent of the label is drawn and the user must click the left mouse button to indicate the new label location. The label text may also be modified or a label added if one does not currently exist by entering the information in the label field on the main graphics panel.
Modifying Annotation Data:
The annotation string to be modified is selected by clicking the left mouse button near the text. The string selected is marked with small squares at either end of the string; the color indicated by the handle color. The only modification option valid for annotation is move. An outline showing the extent of the string is immediately visible. Clicking the left mouse button on the image indicates the new location for the string. The annotation text may be modified by entering the new information into the text field on the main graphics panel.The color, font, or line width (where applicable) may be changed by indicating the new value on the main graphics panel. The user may also define attributes or set attribute values by selecting the appropriate buttons from the main graphics panel.