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More about Xcode – can use emacs shortcuts
control-F: Move forward, to the right (same as the right arrow).
control-B: Move backwards, to the left (same as the left arrow).
control-P: Move to the previous line (same as the up arrow).
control-N: Move to the next line (same as the down arrow).
control-A: Move to the beginning of a line (same as the as command-left arrow).
control-E: Move to the end of a line (same as the as command-right arrow).
control-T: Transpose (swap) the characters on either side of the cursor.
control-D: Delete the character to the right of the cursor.
control-K: Kill (delete) the rest of the line. This is handy if you want to redo the end of a line of code.
Control-L: Center the insertion point in the window. This is great if you’ve lost your text cursor or want to quickly scroll the window so the insertion point is front and center.