How do I stretch unfilled shape.

Thanks. This will work slowly, where I have to drag each edge. I tried doing a rectangular select to grab multiple edges and stretch them, but couldn't get anywhere. Imagine a fat cross or plus sign. I want to select the right half, having a vertical select boundary running down through the middle, then stretch everything on the right rightward. Thus, the vertical portion of the object in the middle gets wider (fatter), with the right side extending correspondingly more to the right. That is, I select the right half using a rectangular area and stretch everything inside that area to the right. Again, I can select edges and probably vertexes with the method you mentioned. But then I have to do it three times, once for each of my vertical edges (think of the cross). And the distance is critical, so I have to be very careful. I'd rather only be careful once. I have to repeat this for half a dozen overlapping areas. I really wish I could select multiple and stretch all of them with one grab. I could do this in Eagle, I believe.

Thanks for the suggestion, redwire. Please note that I did try this, but it appears that merge is not allowed on unfilled shapes, and my shapes are unfilled. You and I both can fathom a way to make this work -- assume the shape is filled, union the area, determine a new outline, realize the shape is not to be filled -- but then doing that would require good user interface design... Aside from wanting to know how for future more difficult tasks, note that it only took six edge stretches to accomplish my task (along with five wholesale moves of shapes totally enclosed within my desired stretch select area). I'll have to repeat for another board, but it's not a big ordeal.