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Adding Continuation Passages

VIII. Continuation Passages. Passage that continue past the point were the survey ends are usually depicted with dotted lines. The next step in the process will be to add these kinds of passages.
Begin by opening the passage at the appropriate point as described in the previous section. You can then drag the ends of the passage and adjust the control points so the end point in the right direction.
We are now ready to begin drawing the passage wall continuations. First, select the Bezier Tool from the tool bar on the left.

Next, select the "Object -> Fill and Stroke" option from the menu bar and select the "Stroke Style page.  This will allow us to adjust the line characteristics while we work.
We'll now begin drawing lines. Click just off the end of the left passage and then move the mouse in the direction the passage goes. This will cause a thin red line to follow the mouse cursor. Click again, and the line will become fixed and turn green, and a new red line will follow the cursor. Do this several times along the course of the passage wall. When you have reached the end, right click and a new black line will be drawn. If the line is too thick, use the Stroke Style, width option to adjust it.

Do the same thing with the right side of the passage. When you are done, you should have two passage wall lines drawn.

Now switch to the Node Tool and use the techniques you learned earlier to adjust and smooth the passage wall lines. Finally, when you are satisfied with the shape of the passages, select one of the lines and press the Arrow button to the right of Dashes display. This will show you a long list of dotted and dashed lines. When you select one, your line will be redrawn with that pattern. Experiment with the different options until you find something you like.

At this point, the passage will extend beyond the white mask area. To deal with this problem, simply go back and select the mask layer and, use the Node Tool to expand the mask. You can double click along the edge of the mask to add new nodes. You can then drag these new nodes into position to fill the new area. Likewise, you can use the Bezier control points to shape, smooth and adjust the mask until it matches the newly added passage.

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