problems solved, explanation inside
Thanks to all who have written and made suggestions. The answer had nothing to do with what I was writing. It seems that the keys for left and right bracket were not labeled as to their function. So my sighted techie frien went into the options menue, and to the keyboard menue and labeled the bracket keys to say start and finish markers. Now the program seemes normally. I can’t tell you what a relief this is-but I’m sure you understand.