Brett:
We start with a rectangle and a grid with some sample text on it. Note, that for this example I have placed an extra anchor point at the top of the rectangle. Make sure the rectangle is the front most object (Select, then Ctrl-Shift-] to bring to front):
To use envelopes to their full potential, we must adjust the default settings first. Go to Object>Envelope Distort>Envelope Options, and set the options like this:
Select both the rectangle and the grid/text, and hit Ctrl-Alt-C, that's the shortcut for "Make Envelope with Top Object). The result looks like this:
Now, activate the Direct Select tool (white arrow without the +), then activate the Pen (NOT Pencil) tool. The reason you activate the Direct Select tool before going to the Pen tool, is that when you hit Ctrl combined with most tools, you will revert to the most recently used selection tool.
Now, with the pen tool still active, press Ctrl (the pen changes to the direct select arrow) and select the top center anchor, and Shift-Drag it up a ways (Shift constrains the motion to the default constrain angles, in this case 90 degrees):
Release all modifier keys, and press Alt. Now, the pen tool should turn into a little upturned "v" shape, the Convert Anchor Point tool. Grab a hold of the left handle coming out of the center top anchor, and drag it straight down. Here's the result. As you can see, everything is still straight up and down, even though the art is distorted along the vertical axis.
Lastly, press Ctrl, and select the bottom right anchor, and slide it straight up. Still, everything stays straight up and down:
Look at an envelope as a rubber mat. If you pull straight up or down, it will stretch in that direction, but not sideways from that direction. If you lengthen the handles in any direction, that's the direction the distortion will go in the rubber mat.
Look at this final image, and see what happens when handles are pulled in different directions:
To recap: The reason you want to have the pen tool active, is that you can use its modification tools (especially the Convert Anchor) easily that way. As long as you pull straight up and down, the art will only distort along the vertical axis. Go play. Let me know if you have any further questions.
HTH
Bert
Bert Philippus -