Start by learning the line tools. Click the starting point of a line and look down at the bottom left corner of the screen. Type the length of the line you want and hit Enter on your keyboard. It will automatically draw the line that length. The seventh button from the left is the parallel line tool. Click a line, type the distance you want the parallel line to be and hit Enter. Instant parallel lines. I use this tool to lay out ribs at exact spacings.

In the bottom right hand of the screen is a little red crosshair symbol. That tells your lines to snap to the nearest point in your drawing. Click the crosshair symbol and it will change to "Snap to Grid" or turn snapping off. 99% of the time I leave it set to the crosshairs to snap to the nearest point in my drawing.

If you start a line that you don't want to finish drawing, click the "ESC" key to escape.

Next learn the Edit menu. The fifth button from the left is called "Slide an Endpoint." Use that tool to extend or shorten a line by clicking on the line's endoint and sliding the mouse pointer.

On the Select menu click the first button and draw a rectangle around an object to select it. Click the fourth button to move the object around on the drawing. The sixth button will let you "Mirror" a selcted object so you can draw one wing panel and mirror it to instantly create the other panel (click the "Copy" button after clicking the Mirror button).

Basically just play around with all the buttons to see what they do.

David