Thanks to everyone who offered advice and suggestions.
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please forgive my late response.
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Bev suggested settings to change but didn¡¯t match the options on this MacBook. ?However they led me to change ¡° Show Bottom Preview¡± which when not active allows me to see a greater part of any email. So that is mostly resolved.
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prior to that I changed the screen resolution which also helped but makes portions of some items too small for these eyes.
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The bottom line is that I can continue to use this MacBook Air but I will probably buy a Different computer that has a larger screen.
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once again thanks.
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Bobby
Bob Stern