Differentiating between the left and right ALT keys might add more complications as they have different uses depending on the keyboard type/language/etc.
I could add an option that requires the Shift key (or maybe the Control key) to enable a mark/copy and, after that, you can either continue to hold it or release it for the existing behaviour regarding wrapped lines/control codes. How does that sound?
Update: the Control key might make more sense here as it is associated with Control+C when copying text.
Last edited by Khaled; 14/02/17 01:37 PM.