Doubleclick does not work anymore

can someone tell me how it is that I see with other make users that when they double click on a function it immediately moves to the field to be filled in . I always have to drag this . also if I type a function BV “Replace” and then Press it does not recognize this function . Normally this “Replace” would change to gray so you can see that it recognizes this function . In the beginning this worked but not anymore! Is this a setting?