How to select subset of characters in many lines (column selection) in Eclipse/Android Studio? Ideally without plugins. Shift+Alt+A seems not to be working for me either.
<Lots of previous answers, but this might be easier or more straightforward as compared to memorizing key shortcuts.
Just Right-click while the cursor is inside a file/class, then select/deselect 'column selection mode' from the list of options that appears (usually the fifth option on the list)
the short cut key to select more column character: shift+up or down arrow (define more line) then shift +left or right arrow for select text