@vjjustin,
There are 2 dictionary patches in the current firmware:
- patch_name = `Dictionary frame size - beta8`, in nickel.patch, which controls the size of the pop-up window. It aims to use as close to 50% of the screen as possible without completely obscuring the mini 3-icon pop-up (highlight/search/share) when the selected word is about halfway down the page. There is no attempt to permanently anchor the dictionary pop-up to either the top or the bottom of the screen
- patch_name = `Dictionary text font-family/font-size/line-height - beta`, in libnickel.so.1.0.0.patch, which controls the appearance of the text within the pop-up
The firmware code which controls the dictionary pop-up changed a few firmwares ago. As you might guess from the 'beta8' part of the patch name of the first patch, it was 'a bit of a pig' to get it working at all after Kobo's firmware changes
However, if your aim is to make the dictionary window much bigger you don't really need the first patch at all. Once you select a word and get the initial pop-up just tap in a blank area somewhere inside the box and you'll get the (almost) fullscreen version of the dictionary definitions, and therefore less 'pages' to scroll through.