@PF4Mobile, ok, so based on the points you presented here is what i've found:
-a mode in which you can embolden the pdf
[LubiB] - The PDFs will look the same on the device as they look on your comp. You can increase and decrease the zoom and i think they're adding a better reflow feature in the next update based on my previous questions to Ectaco
-zoom in (zoom levels and custom zoom)
[LubiB] - There are 7 zoom options: Fit Page, 50, 75, 80, 100, 125, 150. I reformat the PDFs on my comp to fit them to screen in the size i want so they look better for what i want in a PDF, usually takes about 2 minutes to do it i'll list the steps if anyones interested. I will load some of my sisters geometry textbook pages to the jetBook Color and post them probably on Monday.
-landscape view
[LubiB] - The only landscape view i saw was actually one of ProDigits jpgs from my previous post. I've yet to fiddle around with this feature but will post when i get more into it.
-are the annotation tools available in landscape mode ?
[LubiB] - Based on the above, i'll def get to it shortly
-hide margins
[LubiB] - Havent had an issue with margins as you can fit the text to screen using the "Fit to Screen" option
-selection zoom
[LubiB] - 7, listed above
-column mode
[LubiB] - not sure what this is but all my PDFs and notes are in regular standing (vertical) mode ((i hope this is what it means)) and they look great like in the previous pics on my first post.
-free hand drawing on PDFs (scribbling?)
[LubiB] - Not yet. Looks like it might be an update. The highlighting and saving the text feature works beautifully though which is a plus.
-Does the highlighted text get stored in the PDF file or separately ?
[LubiB] - It gets stored in the file where you saved the highlighted notes. Here's how it looks: Highlight text -> choose "Mark for Summary" option -> whenever you need to look at the notes you saved click the "Menu" key -> "Show Summary" -> and it's there.
-What format is this file (if it is a distinct file)?
[LubiB] - It's saved into the PDF, not sure about the file extension individually.
-How can you transfer the files to PC?
[LubiB] - Connect it to your computer via miniUSB -> drag and drop files. It's that easy. Conveniently you can make your own folders as well. And microSD works well too with the little trick i posted about it
-How about scribbling ?
[LubiB] - Nope, not yet.
I hope i was thorough enough in this lol