I've followed the instructions in Makzan's blog and can create a local .asc file without a problem. However, when I want to open a .asc or .asciidoc file from an iCloud, they are greyed out, while adjacent .html and .json files are opening fine. Also, for the local files, preview does not render AsciiDoc really. What's special about iCloud and how do we enable the review?

Instead of moving the cursor multiple steps in one direction by pressing and holding one of the cursor arrows (for up, down, left, right), allow the user to set the direction of cursor movement with the first press (up/down or left/right) and determine distance (number of steps) from the initial position using continuous circular motions either clockwise or counterclockwise to move the cursor to positions after (clockwise) or before (counterclockwise) the initial position. Direction and distance from the initial position are more easily controlled. 

For instance, to move the cursor multiple characters to the left of the current (initial) position, press the left (or right) arrow and swipe your finger in a circular motion counterclockwise until the cursor is where you want it. To move the cursor multiple lines up, press the up (or down) arrow and swipe in a continuous counterclockwise circular motion until the desired line before the initial position is reached. 

Tell me if more explanation is needed.