I'm looking for drawing apps suitable for use while giving a lecture.The key feature that I'm interested in is that the view on the iPad is not the same as the view on the projected screen. I'm using video mirroring to send the iPad display signal to the projector.For example, I want to see options for colors and pens, line thickness, etc, but I don't want the audience to see me making these selections. Ideally they would see only the drawing. It would be great if I could also type on the on screen keyboard of the iPad without the audience seeing me typing.Adobe Ideas previously had this feature but now it seems to have been removed. That's the only app that I know for sure that did this (of drawing apps). Other apps like Keynote will show presenter notes to the presenter but not to the audience (similar to how it's done on the mac). Any ideas???? Thanks!