I would like to do a little (not a lot) work with a split screen, largely to look at spreadsheets and bank statements simultaneously, and also to compare spreadsheets with data sources. I don't do this very often or for very long. I am a long-time novice on computers, so don't want anything too complicated (and would prefer access to a written list of instructions or a telephone number to th provider). Having looked very briefly at YouTube videos on Magnet and BetterSnapTool apps, was hoping some users of each could give me a recommendation on which of these would most easily do the job. Or even suggest something else if more appropriate. Thanks!