I have a 5X6 table , and I would like to know how to select column A and column C in Writer and Impress. Thanks.
Upgrade to 5.0.0 [RC5] if not using old OS X.
Control+click the header of each non-adjacent column works in Calc.
On MacOS Sierra, it would appear that things are a bit more complicated. See: Multiple Cell Selection - #10 by PatrickT
I think there is no way to do a multi selection.