As I mentioned in reply to the email you sent me a few days ago... you have to use maxwidth/alt-maxwidth and maxheight/alt-maxheight to get the effect you're after.
For example, maxwidth=320 alt-maxwidth=700
This will produce a "default" image of 320 pixels wide, and when tapped upon, will expand to a 700 pixel image (with sufficient available RAM to unpack, of course). If you don't have enough ram to unpack the "full" image, it will just throw an error.
Plucker Desktop has some "smarts" built into it that will downsample the image to a lower bpp or resolution, if it can't display it with the parameters you've specified. Its one of the reasons I don't use it (besides the fact that it requires a GUI and is interactive, of course).
There are a lot of open issues with Plucker Desktop that need to be resolved... its great for learning how to use Plucker, but its not the best way to use Plucker (right now) if you want a powerful distiller. It lags behind the Python distiller by about 18 months or more (as do Sunrise and JPluck).
Stick with the Python distiller, forgoe the GUI applications and you'll uncover the powerful features you seek (tables, much more granular image support, lots of other things).
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