[Part II]
3.) Back over in DTPO - here be what my highlight options are, having set these up in preferences [and also, incidentally, set up in the same way in Goodreader on my iPad];
4.) Here be the floating KM menu, that I invoke with a keyboard shortcut, when I’m in Annotating mode. As soon as I’m done, I close it again, to avoid my shortcuts [for its specific use] interfering with the ordinary shortcuts inside DTPO.
As an aside – to “turn off” the selected Highlight, I use the same KM setup, but simply select the Highlight menu option, which acts as a ‘toggle’, removing any highlight where the text I’ve selected, has already been highlighted.
Lastly – although, this is by no means necessary – here be a screengrab of ActionsApp for iPad, showing the subset menu I created [DTPO Highlighting], together with all the options thereunder. Each of those “buttons” are live - so tapping them, invokes the keyboard shortcut [e.g.] CMD+1, which invokes the KM palette, and highlights the selected text in yellow…
I like to use my iPad in conjunction with all of the above, since I find it to be quicker than finding the individual keyboard shortcuts each time – bigger area to tap/colour coded/less thinking! 
So - picture my using my Bamboo Wacom pad [see here: [url]Anyone use a Wacom Bamboo pad to annotate PDFs inside DTPO?] ] in the one hand, selecting the text as I read along – and the other hand, tapping away at the iPad, each time I want to highlight/change colour… Really quick and simple, imo!
Hope this might give some DTP users some ideas, and maybe make things go quicker – certainly has sped things up my side!